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wasm-bindgen Change Log

Unreleased

Added

  • Added support for the HTMLOrSVGElement mixin, which is used for all interfaces deriving from Element. #4143

  • Added bindings for MathMLElement. #4143

  • Added JSDoc type annotations to C-style enums. #4192

  • Added support for C-style enums with negative discriminants. #4204

  • Added bindings for MediaStreamTrack.getCapabilities. #4236

  • Added WASM ABI support for u128 and i128 #4222

Changed

  • String enums now generate private TypeScript types but only if used. #4174

  • Remove unnecessary JSDoc type annotations from generated .d.ts files #4187

  • Deprecate autofocus, tabIndex, focus() and blur() bindings in favor of bindings on the inherited Element class. #4143

  • Optimized ABI performance for Option<{i32,u32,isize,usize,f32,*const T,*mut T}>. #4183

  • Reference type proposal transformations are not applied by default when detecting it in the Wasm module for the bundler target because currently webpack doesn't support it. #4235

  • Deprecate --reference-types in favor of automatic target feature detection. #4237

  • wasm-bindgen-test-runner now tries to restart the WebDriver on failure, instead of spending its timeout period trying to connect to a non-existing WebDriver. #4267

Fixed

  • Fixed methods with self: &Self consuming the object. #4178

  • Fixed unused string enums generating JS values. #4193

  • Fixed triggering lints in testing facilities. #4195

  • Fixed #[should_panic] not working with #[wasm_bindgen_test(unsupported = ...)]. #4196

  • Fixed potential null error when using JsValue::as_debug_string(). #4192

  • Fixed generated types when the getter and setter of a property have different types. #4202

  • Fixed generated types when a static getter/setter has the same name as an instance getter/setter. #4202

  • Fixed invalid TypeScript return types for multivalue signatures. #4210

  • Only emit table.fill instructions if the bulk-memory proposal is enabled. #4237

  • Fixed calls to JsCast::instanceof() not respecting JavaScript namespaces. #4241

  • Fixed imports for functions using this and late binding. #4225

0.2.95

Released 2024-10-10

Added

  • Added support for implicit discriminants in enums. #4152

  • Added support for Self in complex type expressions in methods. #4155

Changed

  • String enums are no longer generate TypeScript types. #4174

Fixed

  • Fixed generated setters from WebIDL interface attributes binding to wrong JS method names. #4170

  • Fix string enums showing up in JS documentation and TypeScript bindings without corresponding types. #4175

0.2.94 (YANKED)

Released 2024-10-09

Added

  • Added support for the WebAssembly Tail Call proposal. #4111

  • Add bindings for RTCPeerConnection.setConfiguration(RTCConfiguration) method. #4105

  • Add bindings to RTCRtpTransceiverDirection.stopped. #4102

  • Added experimental support for Symbol.dispose via WASM_BINDGEN_EXPERIMENTAL_SYMBOL_DISPOSE. #4118

  • Added bindings for the draft WebRTC Encoded Transform spec. #4125

  • Added Debug implementation to JsError. #4136

  • Added support for js_name and skip_typescript attributes for string enums. #4147

  • Added unsupported crate to wasm_bindgen_test(unsupported = test) as a way of running tests on non-Wasm targets as well. #4150

  • Added additional bindings for methods taking buffer view types (e.g. &[u8]) with corresponding JS types (e.g. Uint8Array). #4156

  • Added additional bindings for setters from WebIDL interface attributes with applicaple parameter types of just JsValue. #4156

Changed

  • Implicitly enable reference type and multivalue transformations if the module already makes use of the corresponding target features. #4133

  • Updated Gamepad API. #4134

  • Deprecated Gamepad::display_id and GamepadHapticActuator::type_. #4134

  • Removed GamepadAxisMoveEvent, GamepadAxisMoveEventInit, GamepadButtonEvent, GamepadButtonEventInit and GamepadServiceTest, which were seemingly never implemented by any JS environment. #4134

  • Changed TextDecoder.decode() input parameter type from &mut [u8] to &[u8]. #4141

  • Updated the WebGPU API to the current draft as of 2024-10-07. #4145

  • Deprecated generated setters from WebIDL interface attribute taking JsValue in favor of newer bindings with specific parameter types. #4156

Fixed

  • Fixed linked modules emitting snippet files when not using --split-linked-modules. #4066

  • Fixed incorrect deprecation warning when passing no parameter into default() (init()) or initSync(). #4074

  • Fixed many proc-macro generated impl blocks missing #[automatically_derived], affecting test coverage. #4078

  • Fixed negative BigInt values being incorrectly formatted with two minus signs. #4082 #4088

  • Fixed emitted package.json structure to correctly specify its dependencies #4091

  • Fixed returning Option<Enum> now correctly has the | undefined type in TS bindings. #4137

  • Fixed enum variant name collisions with object prototype fields. #4137

  • Fixed multiline doc comment alignment and remove empty ones entirely. #4135

  • Fixed experimental-nodejs-module target when used with #[wasm_bindgen(start)]. #4093

  • Fixed error when importing very large JS files. #4146

  • Specify "type": "module" when deploying to nodejs-module #4092

  • Fixed string enums not generating TypeScript types. #4147

  • Bindings that take buffer view types (e.g. &[u8]) as parameters will now correctly return a Result when they might not support a backing SharedArrayBuffer. This only applies to new and unstable APIs, which won't cause a breaking in the API. #4156

0.2.93

Released 2024-08-13

Added

  • Allow exporting functions named default. Throw error in wasm-bindgen-cli if --target web and an exported symbol is named default. #3930

  • Added support for arbitrary expressions when using #[wasm_bindgen(typescript_custom_section)]. #3901

  • Implement From<NonNull<T>> for JsValue. #3877

  • Add method copy_within for TypedArray, add methods find_last,find_last_index for Array. #3888

  • Added support for returning Vecs from async functions. #3630

  • Added bindings for InputDeviceInfo and MediaTrackCapabilities. #3935

  • Add bindings for RTCRtpReceiver.getCapabilities(DOMString) method. #3941

  • Add bindings for VisualViewport. #3931

  • Add bindings for queueMicrotask. #3981

  • Add experimental bindings for User Agent Client Hints API #3989

  • Add bindings for FocusOptions. #3996

  • Add bindings for RTCRtpReceiver.jitterBufferTarget. #3968

  • Generate getters for all WebIDL dictionary types. #3993

  • Support for iterable in WebIDL. Gives entries, keys, values methods for regular and asynchronous, as well as for_each for regular, iterables. #3962

  • Add bindings for HTMLTableCellElement.abbr and scope properties. #3972

  • Add WebIDL definitions relating to Popover API. #3977

  • Added the thread_stack_size property to the object parameter of default() (init()) and initSync(), making it possible to set the stack size of spawned threads. __wbindgen_thread_destroy() now has a third optional parameter for the stack size, the default stack size is assumed when not passing it. When calling from the thread to be destroyed, by passing no parameters, the correct stack size is determined internally. #3995

  • Added bindings to the Device Memory API. #4011

  • Added support for WebIDL records. This added new methods to various APIs, notably ClipboardItem(), GPUDeviceDescriptor.requiredLimits and Header(). #4030

  • Added an official MSRV policy. Library MSRV changes will be accompanied by a minor version bump. CLI tool MSRV can change with any version bump. #4038

  • Added bindings to NavigatorOptions.vibrate. #4041

  • Added an experimental Node.JS ES module target, in comparison the current node target uses CommonJS, with --target experimental-nodejs-module or when testing with wasm_bindgen_test_configure!(run_in_node_experimental). #4027

  • Added importing strings as JsString through #[wasm_bindgen(thread_local, static_string)] static STRING: JsString = "a string literal";. #4055

  • Added experimental test coverage support for wasm-bindgen-test-runner, see the guide for more information. #4060

Changed

  • Stabilize Web Share API. #3882

  • Generate JS bindings for WebIDL dictionary setters instead of using Reflect. This increases the size of the Web API bindings but should be more performant. Also, importing getters/setters from JS now supports specifying the JS attribute name as a string, e.g. #[wasm_bindgen(method, setter = "x-cdm-codecs")]. #3898

  • Greatly improve the performance of sending WebIDL 'string enums' across the JavaScript boundary by converting the enum variant string to/from an int. #3915

  • Use table.fill when appropriate. #3446

  • Annotated methods in WebCodecs that throw. #3970

  • Update and stabilize the Clipboard API. #3992

  • Deprecate builder-pattern type setters for WebIDL dictionary types and introduce non-mutable setters instead. #3993

  • Allow imported async functions to return any type that can be converted from a JsValue. #3919

  • Update Web Authentication API to level 3. #4000

  • Deprecate AudioBufferSourceNode.onended and AudioBufferSourceNode.stop(). #4020

  • Increase default stack size for spawned threads from 1 to 2 MB. #3995

  • Deprecated parameters to default (init) and initSync in favor of an object. #3995

  • Update AbortSignal and AbortController according to the WHATWG specification. #4026

  • Update the Indexed DB API. #4027

  • UnwrapThrowExt for Result now makes use of the required Debug bound to display the error as well. #4035 #4049

  • MSRV of CLI tools bumped to v1.76. This does not affect libraries like wasm-bindgen, js-sys and web-sys! #4037

  • Filtered files in published crates, significantly reducing the package size and notably excluding any bash files. #4046

  • Deprecated JsStatic in favor of #[wasm_bindgen(thread_local)], which creates a std::thread::LocalKey. The syntax is otherwise the same. #4057

  • Removed impl Deref for JsStatic when compiling with cfg(target_feature = "atomics"), which was unsound. #4057

  • Updated the WebGPU WebIDL to the current draft as of 2024-08-05. #4062

  • Use object URLs for linked modules without --split-linked-modules. #4067

Fixed

  • Copy port from headless test server when using WASM_BINDGEN_TEST_ADDRESS. #3873

  • Fix catch not being thread-safe. #3879

  • Fix MSRV compilation. #3927

  • Fix clippy::empty_docs lint. #3946

  • Fix missing target features in module when enabling reference types or multi-value transformation. #3967

  • Fixed Rust values getting GC'd while still borrowed. #3940

  • Fixed Rust values not getting GC'd if they were created via. a constructor. #3940

  • Fix triggering clippy::mem_forget lint in exported structs. #3985

  • Fix MDN links to static interface methods. #4010

  • Fixed Deno support. #3990

  • Fix __wbindgen_thread_destroy() ignoring parameters. #3995

  • Fix no_std support and therefor compiling with default-features = false. #4005

  • Fix byte order for big-endian platforms. #4015

  • Allow ex/importing structs, functions and parameters named with raw identifiers. #4025

  • Implement a more reliable way to detect the stack pointer. #4036

  • #[track_caller] is now always applied on UnwrapThrowExt methods when not targeting wasm32-unknown-unknown. #4042

  • Fixed linked modules emitting snippet files when not using --split-linked-modules. #4066

0.2.92

Released 2024-03-04

Added

  • Add bindings for RTCPeerConnectionIceErrorEvent. #3835

  • Add bindings for CanvasState.reset(), affecting CanvasRenderingContext2D and OffscreenCanvasRenderingContext2D. #3844

  • Add TryFrom implementations for Number, that allow losslessly converting from 64- and 128-bits numbers. #3847

  • Add support for Option<*const T>, Option<*mut T> and NonNull<T>. #3852 #3857

  • Allow overriding the URL used for headless tests by setting WASM_BINDGEN_TEST_ADDRESS. #3861

Fixed

  • Make .wasm output deterministic when using --reference-types. #3851

  • Don't allow invalid Unicode scalar values in char. #3866

0.2.91

Released 2024-02-06

Added

  • Added bindings for the RTCRtpTransceiver.setCodecPreferences() and unstable bindings for the RTCRtpEncodingParameters.scalabilityMode. #3828

  • Add unstable bindings for the FileSystemAccess API #3810

  • Added support for running tests in shared and service workers with wasm_bindgen_test_configure! run_in_shared_worker and run_in_service_worker. #3804

  • Accept the --skip flag with wasm-bindgen-test-runner. #3803

  • Introduce environment variable WASM_BINDGEN_TEST_NO_ORIGIN_ISOLATION to disable origin isolation for wasm-bindgen-test-runner. #3807

  • Add bindings for USBDevice.forget(). #3821

Changed

  • Stabilize ClipboardEvent. #3791

  • Use immutable buffers in SubtleCrypto methods. #3797

  • Deprecate wasm_bindgen_test_configure!s run_in_worker in favor of run_in_dedicated_worker. #3804

  • Updated the WebGPU WebIDL to the current draft as of 2024-01-30. Note that this retains the previous update's workaround for GPUPipelineError, and holds back an update to the buffer argument of the GPUQueue.{writeBuffer,writeTexture} methods. #3816

  • Deprecate --weak-refs and WASM_BINDGEN_WEAKREF in favor of automatic run-time detection. #3822

Fixed

  • Fixed UB when freeing strings received from JS if not using the default allocator. #3808

  • Fixed temporary folder detection by wasm-bindgen-test-runner on MacOS. #3817

  • Fixed using #[wasm_bindgen(js_name = default)] with #[wasm_bindgen(module = ...)]. #3823

  • Fixed nightly build of wasm-bindgen-futures. #3827

0.2.90

Released 2024-01-06

Fixed

  • Fix JS shim default path detection for the no-modules target. #3748

Added

  • Add bindings for HTMLFormElement.requestSubmit(). #3747

  • Add bindings for RTCRtpSender.getCapabilities(DOMString) method, RTCRtpCapabilities, RTCRtpCodecCapability and RTCRtpHeaderExtensionCapability. #3737

  • Add bindings for UserActivation. #3719

  • Add unstable bindings for the Compression Streams API. #3752

Changed

  • Stabilize File System API. #3745

  • Stabilize QueuingStrategy. #3753

Fixed

  • Fixed a compiler error when using #[wasm_bindgen] inside macro_rules!. #3725

Removed

  • Removed Gecko-only InstallTriggerData and Gecko-internal FlexLineGrowthState, GridDeclaration, GridTrackState, RtcLifecycleEvent and WebrtcGlobalStatisticsReport features. #3723

0.2.89

Released 2023-11-27.

Added

  • Add additional constructor to DataView for SharedArrayBuffer. #3695

  • Stabilize wasm_bindgen::module(). #3690

Fixed

  • The DWARF section is now correctly modified instead of leaving it in a broken state. #3483

  • Fixed an issue where #[wasm_bindgen] automatically derived the TryFrom trait for any struct, preventing custom TryFrom<JsValue> implementations. It has been updated to utilize a new TryFromJsValue trait instead. #3709

  • Update the TypeScript signature of __wbindgen_thread_destroy to indicate that it's parameters are optional. #3703

Removed

  • Removed Gecko-internal dictionary bindings Csp, CspPolicies, CspReport and CspReportProperties. #3721

0.2.88 (YANKED)

Released 2023-11-01

Added

  • Add bindings for RTCRtpTransceiverInit.sendEncodings. #3642

  • Add bindings for the Web Locks API to web-sys. #3604

  • Add bindings for ViewTransition to web-sys. #3598

  • Extend AudioContext with unstable features supporting audio sink configuration. #3433

  • Add bindings for WebAssembly.Tag and WebAssembly.Exception. #3484

  • Re-export wasm-bindgen from js-sys, web-sys and wasm-bindgen-futures. #3466 #3601

  • Re-export js-sys from web-sys and wasm-bindgen-futures. #3466 #3601

  • Add bindings for async variants of Atomics.wait. #3504

  • Add bindings for WorkerGlobalScope.performance. #3506

  • Add support for installing pre-built artifacts of wasm-bindgen-cli via cargo binstall wasm-bindgen-cli. #3544

  • Add bindings for RTCDataChannel.id. #3547

  • Add bindings for HTMLElement.inert. #3557

  • Add unstable bindings for the Prioritized Task Scheduling API. #3566

  • Add bindings for CssStyleSheet constructor and replace(_sync) methods. #3573

  • Add bindings for CanvasTransform.setTransform(DOMMatrix2DInit). #3580

  • Add a crate attribute to the wasm_bindgen_test proc-macro to specify a non-default path to the wasm-bindgen-test crate. #3593

  • Add support for passing Vecs of exported Rust types and strings to/from JS. #3554

  • Implement TryFrom<JsValue> for exported Rust types and strings. #3554

  • Handle the #[ignore = "reason"] attribute with the wasm_bindgen_test proc-macro and accept the --include-ignored flag with wasm-bindgen-test-runner. #3644

  • Added missing additions to the Notification API. #3667

Changed

  • Updated the WebGPU WebIDL. The optional message argument of GPUPipelineError's constructor has been manually specified as a required argument, because required arguments occurring after optional arguments are currently not supported by the generator. #3480

  • Replaced curl with ureq. By default we now use Rustls instead of OpenSSL. #3511

  • Changed mutability of the argument buffer in write functions to immutable for FileSystemSyncAccessHandle and FileSystemWritableFileStream. It was also automatically changed for IdbFileHandle, which is deprecated. #3537

  • Changed behavior when compiling to wasm32-wasi to match wasm32-emscripten and non-Wasm targets, generating a stub that panics when called rather than a wasm- bindgen placeholder. #3233

  • Changed constructor implementation in generated JS bindings, it is now possible to override methods from generated JS classes using inheritance. When exported constructors return Self. #3562

  • Made wasm-bindgen forwards-compatible with the standard C ABI. #3595

  • Changed the design of the internal WasmAbi trait. Rather than marking a type which can be passed directly as a parameter/result to/from JS, it now lets types specify how they can be split into / recreated from multiple primitive types which are then passed to/from JS. WasmPrimitive now serves the old function of WasmAbi, minus allowing #[repr(C)] types. #3595

  • Use queueMicrotask in wasm-bindgen-futures for scheduling tasks on the next tick. If that is not available, use the previous Promise.then mechanism as a fallback. This should avoid quirks, like exceptions thrown get now properly reported as normal exceptions rather than as rejected promises. #3611

  • Improved TypeScript bindings to accurately reference Rust enum types in function signatures, enhancing type safety and compatibility. #3647

  • Throw an error on enum name collisions, previously only one enum would be emitted. #3669

Fixed

  • Fixed wasm_bindgen macro to handle raw identifiers in field names. #3621

  • Fixed bindings and comments for Atomics.wait. #3509

  • Fixed wasm_bindgen_test macro to handle raw identifiers in test names. #3541

  • Fixed Cargo license field to follow the SPDX 2.1 license expression standard. #3529

  • Use fully qualified paths in the wasm_bindgen_test macro. #3549

  • Fixed bug allowing JS primitives to be returned from exported constructors. #3562

  • Fixed optional parameters in JSDoc. #3577

  • Use re-exported js-sys from wasm-bindgen-futures to account for non-default path specified by the crate attribute in wasm_bindgen_futures proc-macro. #3601

  • Fix bug with function arguments coming from macro_rules!. #3625

  • Fix some calls to free() missing alignment. #3639

  • Fix wrong ABI for raw pointers. #3655

Removed

  • Removed ReadableStreamByobReader::read_with_u8_array() because it doesn't work with Wasm. #3582

  • Removed GetNotificationOptions, NotificationBehavior and Notification.get() because they don't exist anymore.

0.2.87

Released 2023-06-12.

Added

  • Implemented IntoIterator for Array. #3477

Changed

  • Deprecate HtmlMenuItemElement and parts of HtmlMenuElement. #3448

  • Stabilize ResizeObserver. #3459

Fixed

  • Take alignment into consideration during (de/re)allocation. #3463

0.2.86

Released 2023-05-16.

changes

0.2.85

Released 2023-05-09.

changes

0.2.84

Released 2023-02-01.

changes

0.2.83

Released 2022-09-12.

changes

0.2.82

Released 2022-07-25.

changes

0.2.81

Released 2022-06-14.

changes

0.2.80

Released 2022-04-04.

changes

0.2.79

Released 2022-01-19.

changes

0.2.78

Released 2021-09-15.

changes

0.2.77

Released 2021-09-08.

changes

0.2.76

Released 2021-08-19.

changes

0.2.75

Released 2021-08-02.

changes

0.2.74

Released 2021-05-10.

changes

0.2.73

Released 2021-03-29.

changes

0.2.72

Released 2021-03-18.

changes

0.2.71

Released 2021-02-26.

changes

0.2.70

Released 2021-01-25.

changes

0.2.69

Released 2020-11-30.

Added

  • Unstable bindings for WebBluetooth have been added. #2311

  • Unstable bindings for WebUSB have been added. #2345

  • Renaming a struct field with js_name is now supported. #2360

  • The WebGPU WebIDL has been updated. #2353

Fixed

  • The ImageCapture APIs of web-sys have been moved to unstable and were fixed. #2348

  • Bindings for waitAsync have been updated. #2362

0.2.68

Released 2020-09-08.

Added

  • Add userVisibleOnly property to PushSubscriptionOptionsInit. #2288

Fixed

  • TypeScript files now import *.wasm instead of bare files. #2283

  • Usage of externref now appropriately resizes the table by using 2x the previous capacity, fixing a performance issue with lots of externref objects. #2294

  • Compatibility with the latest Firefox WebDriver has been fixed. #2301

  • Non deterministic output with closures has been fixed. #2304

Updated

  • The WebGPU WebIDL was updated. #2267

0.2.67

Released 2020-07-28.

Added

  • A --reference-types flag was added to the CLI. #2257

Fixed

  • Breakage with Closure::forget in 0.2.66 was fixed. #2258

0.2.66

Released 2020-07-28.

Added

  • Reverse mappings from value to name are now available in JS bindings of enums. #2240

Fixed

  • Functions using a return pointer in threaded programs now correctly load and store return values in a way that doesn't interfere with other threads. #2249

  • Support for weak references has been updated and a --weak-refs flag is now available in the CLI for enabling weak references. #2248

0.2.65

Released 2020-07-15.

Added

  • Functions from JS can now be natively imported as async and will use promises under the hood. #2196

Changed

  • Encoding for the reference types proposal has been updated to the latest version of the spec. #2234

0.2.64

Released 2020-06-29.

Added

  • Nested namespaces for imports can now be specified. #2105

  • A deno target has been added. #2176

Fixed

  • Getters/setters that consume the original object have been fixed to invalidate the object correctly. #2172

  • Compatibility with nightly threading in LLVM has been fixed. #2183

  • Trailing space in generated doc comments is now removed. #2210

0.2.63

Released 2020-05-27.

Added

  • A new example about using WebRTC has been added. #2131

  • The Blob.stream() method has been added. #2140 #2142

Changed

  • The encoding and implementation of WebAssembly reference types has been sync'd with the latest upstream specification. #2125

Fixed

  • Test functions names will no longer collide with test intrinsic names. #2123

  • Fixed warnings with #[must_use] types in generated code. #2144

  • Fixed compatibility with latest Rust nightlies. #2159

0.2.62

Released 2020-05-01.

Fixed

  • Usage of require has been fixed with Webpack 5. #2115

0.2.61

Released 2020-04-29.

Added

  • Exported Rust enum types can now be renamed with js_name. #2071

  • More comments are copied to JS/TS files, and comments should no longer accidentally have escape sequences in them. #2070

  • Experimental bindings for the Clipboard browser APIs have been added. #2100

Changed

  • WebGPU bindings have been updated. #2080

  • setBindGroup methods for WebIDL now take immutable slices instead of mutable slices. #2087

  • JS code generation for catch functions has been improved. #2098

  • Usage of NPM dependencies with the web target is no longer an error. #2103

Fixed

  • Combining js_name with getter and setter has now been fixed. #2074

  • Importing global names which conflict with other namespaces should now work correctly. #2057

  • Acquiring the global JS object has been fixed for Firefox extension content scripts. #2099

  • The output of wasm-bindgen is now compatible with Webpack 5 and the updated version of the Wasm ESM integration specification. #2110

0.2.60

Released 2020-03-25.

Added

  • The js_sys types are now more accurately reflected in TypeScript. #2028

  • The timeout in wasm-bindgen-test-runner's timeout can now be configured via WASM_BINDGEN_TEST_TIMEOUT. #2036

  • WebIDL for WebXR has been added. #2000

Changed

  • The WebIDL for WebGPU has been updated. #2037

0.2.59

Released 2020-03-03.

Added

  • The js_sys::Number type now has a number of JS-number associated constants on it now. #1965

  • The getTransform method on CanvasRenderingContext2D has been added. #1966

  • Initial experimental support was added for electron targets with a new --omit-imports flag. #1958

  • Optional struct fields are now reflected idiomatically in TypeScript. #1990

  • Typed arrays in js_sys now have get_index and set_index methods. #2001

  • The web_sys::Blob type has been updated with arrayBuffer and text methods. #2008

  • Support for unstable browser interfaces has now been added. By compiling web_sys with --cfg web_sys_unstable_apis (typically via RUSTFLAGS) you'll be able to access all bound WebIDL functions, even those like GPU support on the web, which has now also had its WebIDL updated. #1997

  • The compile time for web_sys has been massively reduced by pre-generating Rust code from WebIDL. It is also readable now since it generates #[wasm_bindgen] annotations instead of expanded code. #2012

  • A new typescript_type attribute can be used to specify the TypeScript type for an extern type. #2012

  • It is now possible to use string values with #[wasm_bindgen] enums. #2012

  • A new skip_tyepscript attribute is recognized to skip generating TypeScript bindings for a function or type. #2016

Changed

  • More uniformMatrix* bindings now are whitelisted take shared slice instead of a mutable slice. #1957

  • Non-dependency keys in package.json are now ignored instead of error'd about. #1969

  • WebGPU has been removed from web_sys since it was outdated and didn't work anywhere anyway. #1972

  • The JS heap of objects managed by wasm-bindgen has had its definition tightended up a bit. #1987

  • The self identifier is no longer used on the no-modules target, making it a bit more flexible in more environments. #1995

  • The wasm-loading logic is now more flexible and can take promises as well. #1996

  • JS glue for closures is now deduplicated. #2002

  • The web_sys crate now emits more accurate TypeScript definitions using named types instead of any everywhere. #1998

  • The send_with_u8_array methods in web_sys are whitelisted to take shared slices instead of mutable slices. #2015

0.2.58

Released 2020-01-07.

Added

  • When using the no-modules output type the initialization path for the wasm file is now optional if it can be inferred from the current JS script. #1938

Fixed

  • TypeScript for struct methods that have floats has been fixed. #1945

0.2.57

Released 2020-01-06.

Fixed

  • The js_sys::Promise type is now marked as #[must_use] #1927

  • Duplicate imports of the same name are now handled correctly again. #1942

0.2.56

Released 2019-12-20.

Added

  • Added a #[wasm_bindgen(inspectable)] attribute for exported objects to generate toJSON and toString implementations. #1876

  • Support for the most recent interface types proposal has been implemented. #1882

  • Initial support for async iterators has been added. #1895

  • Support for an async start function was added. #1905

  • Array::iter and Array::to_vec methods were added to js-sys. #1909

Fixed

  • Another webkit-specific WebIDL construct was fixed in web-sys. #1865

0.2.55

Released 2019-11-19.

Fixed

  • Running wasm-bindgen over empty anyref modules now works again. #1861

  • Support for multi-value JS engines has been fixed as a Wasm interface types polyfill. #1863

0.2.54

Released 2019-11-07.

Added

  • A safe to_vec method has been added for typed arrays. #1844

  • A unsafe method view_mut_raw has been added to typed arrays. #1850

  • The HTMLImageElement WebIDL has been updated with recent features. #1842

  • Binary crates are now supported and fn main will be automatically executed like the start function. #1843

Changed

  • Some JS glue generation has been tweaked to avoid TypeScript warnings. #1852

0.2.53

Released 2019-10-29.

Fixed

  • A bug with the experimental support for multi-value interface types has been fixed. #1839

0.2.52

Released 2019-10-24.

Added

  • The support for wasm-interface-types now uses multi-value by default. #1805

  • The Worklet IDL has been updated. #1817

  • The HTMLInputElement type has selectionStart and selectionEnd properties now. #1811

  • An unintern function has been added to remove an interned string from the cache. #1828

Changed

  • Some WebIDL indexing getters have been corrected to reflect that they can throw and/or return undefined #1789

Fixed

  • A bug with TextDecoder and Safari has been fxied #1789

0.2.51

Released 2019-09-26.

Added

  • The wasm-bindgen-futures and wasm-bindgen-test crates now require Nightly Rust and have a new major version published as a result. These crates now support async/await by default, and they will be supported in the stable Rust 1.39.0 release. The previous versions of crates will continue to work on stable today. #1741

  • Using #[wasm_bindgen] on an async function will now work and return a Promise on the JS side of things. #1754

  • More helper methods for js_sys::Array have been added. #1749

  • Initial support for the WebAssembly multi-value proposal has been added. #1764

  • Constructors for js_sys::Date with optional parameters has been added. #1759

  • Headless tests can now be run against a remote webdriver client #1744

Changed

  • The passStringToWasm function has been optimized for size. #1736

Fixed

  • BOM markers will not be preserved when passing strings to/from wasm. #1730

  • Importing a static value which isn't a JsValue has been fixed. #1784

  • Converting undefined to a Rust value via into_serde has been fixed. #1783

  • Routine errors are no longer erroneously logged in debug mode. #1788

0.2.50

Released 2019-08-19.

Added

  • Experimental support with a WASM_INTERFACE_TYPES=1 environment variable has been added to emit a Wasm Interface Types custom section, making the output of wasm-bindgen a single standalone WebAssembly file. #1725

Fixed

  • Unrelated errors are now no longer accidentally swallowed by the instantiateStreaming fallback. #1723

0.2.49

Released 2019-08-14.

Added

  • Add binding for Element.getElementsByClassName. #1665

  • PartialEq and Eq are now implemented for all web-sys types. #1673

  • The wasm-bindgen-futures crate now has support for futures when the experimental WebAssembly threading feature is enabled. #1514

  • A new enable-interning feature is available to intern strings and reduce the cost of transferring strings across the JS/Rust boundary. #1612

  • The wasm-bindgen CLI has experimental support for reading native webidl-bindings custom sections and generating JS glue. This support is in addition to Rust's own custom sections and allows using wasm-bindgen with binaries produced by other than rustc possibly. #1690

  • New environment variables have been added to configure webdriver startup arguments. #1703

  • New JsValue::{is_truthy,is_falsy} methods are now available. #1638

Changed

  • JS import shims are now skipped again when they are unnecessary. #1654

  • WebAssembly output files now directly embed the module/name for imports if supported for the target and the import, reducing JS shims even further. #1689

Fixed

  • Support for threads have been updated for LLVM 9 and nightly Rust. #1675 #1688

  • The anyref passes in wasm-bindgen have seen a number of fixes to improve their correctness and get the full test suite running. #1692 #1704

  • Support for futures-preview 0.3.0-alpha.18 has been added to wasm-bindgen-futures. #1716

0.2.48

Released 2019-07-11.

Added

  • All typed arrays now implement From for the corresponding Rust slice type, providing a safe way to create an instance which copies the data. #1620

  • Function::bind{2,3,4} are now available in js-sys. #1633

Changed

  • More WebGL methods have been updated to use shared slices instead of mutable slices. #1639

  • When using the bundler target the import of the Wasm file now uses the .wasm extension to ensure a Wasm file is loaded. #1646

  • The old internal Stack trait has been removed since it is no longer used. #1624

Fixed

  • The js_sys::global() accessor now attempts other strategies before falling back to a Function constructor which can violate some strict CSP settings. #1650

  • Dropping a JsFuture no longer logs a benign error to the console. #1649

  • Fixed an assertion which could happen in some modules when generating bindings. #1617

0.2.47

Released 2019-06-19.

Changed

  • The HtmlHyperlinkElement should now include more native methods after a small edit to the WebIDL. #1604

  • Duplicate names for getters/setters now have a first-class wasm-bindgen error. #1605

Fixed

  • TypeScript definition of init with --target web now reflects that the first argument is optional. #1599

  • A panic with the futures 0.3 support has been fixed. #1598

  • More slice types are recognized as becoming immutable in some WebIDL methods. #1602

  • The function table is now no longer too aggressively removed. #1606

0.2.46

Released 2019-06-14.

Added

  • Bindings for Array#flat and Array#flatMap have been added. #1573

  • All #[wasm_bindgen] types now AsRef to themselves. #1583

  • When using --target web the path passed to init is no longer required. #1579

Fixed

  • Some diagnostics related to compiler errors in #[wasm_bindgen] have been improved. #1550

  • The support for weak references has been updated to the current JS proposal. #1557

  • Documentation and feature gating for web-sys dictionaries has improved. #1572

  • Getter and setter TypeScript has been fixed. #1577

  • The env_logger crate and its tree of dependencies is no longer required to build web-sys. #1586

0.2.45

Released 2019-05-20.

Fixed

  • Using __wbindgen_cb_forget on --target web has been fixed. #1544

Changed

  • More whitelists have been added for web-sys to use shared slices instead of mutable slices. #1539

0.2.44

Released 2019-05-16.

Added

  • Support for exporting "fields" on JS objects wrapping Rust structs which are hooked up to getters/setters has been added. This is in addition to pub struct fields and allows performing more complicated computations in getters/setters. #1440

  • Support for futures 0.3 (and async / await syntax) has been added to the wasm-bindgen-futures crate. #1507

  • Stacks of imported JS functions that throw and aren't marked catch are now logged in debug mode. #1466

  • A utility for counting the size of the anyref heap has been added. #1521

  • Passing ASCII-only strings to Wasm should now be significantly faster. #1470

  • The selectionStart and selectionEnd APIs of text areas have been enabled. #1533

Changed

  • Some more methods in web-sys now take immutable slices instead of mutable ones. #1508

  • TypeScript bindings for Option<T> arguments now use foo? where possible. #1483

Fixed

  • Unnecessary bindings to __wbindgen_object_drop_ref have been fixed. #1504

  • Some direct imports have been fixed for --target web. #1503

  • Both importing and exporting the same name has been fixed. #1506

  • TypeScript typings for init in --target web have been fixed. #1520

  • Calling a dropped Closure should no longer "segfault" but produce a clear error. #1530

0.2.43

Released 2019-04-29.

Added

  • Support for isize and usize arrays has been added. #1448

  • Support customizing dyn_ref and friends via a new is_type_of attribute and apply it to some js_sys bindings. #1405 #1450 #1490

  • A new skip attribute to #[wasm_bindgen] has been added to skip fields and methods when generating bindings. #1410

  • More bindings have been added to web-sys for interfaces tagged with [NoInterfaceObject] in WebIDL. These types always fail dyn_ref and friends and must be manually casted into. #1449

  • Added Debug for JsFuture. #1477

  • Initial bindings for Atomics and SharedArrayBuffer have been added to js_sys. #1463

  • Bindings for Object.fromEntries has been added to js_sys. #1456

  • Tuple structs exported to JS now have indexed struct properties. #1467

  • Binding for new Function(args, body) has been added to js_sys. #1492

  • Bindings for some variadic functions have been added to js_sys. #1491

Changed

  • Many js-sys types have received various tweaks and improvements to ensure they're consistent and work similarly to native Rust types. #1447 #1444 #1473

  • Dummy types in js-sys only used to namespace methods were removed and now modules are used for namespacing instead. #1451

  • Bindings in web-sys are formatted by default for ease of usage in IDEs. #1461

Fixed

  • Documentation for Rust methods now show up in TypeScript as well. #1472

0.2.42

Released 2019-04-11.

Fixed

  • Fixed an issue in Firefox where using encodeInto accidentally caused empty strings to keep getting passed to Rust. #1434

0.2.41

Released 2019-04-10.

Added

  • Initial support for transitive NPM dependencies has been added. #1305

  • The constructor property of Object is now bound in js-sys. #1403

  • The Closure type now always implements Debug. #1408

  • Closures which take one &T argument are now supported. More implementations may be added in the future, but for now it's just one argument closures. #1417

  • The TypeScript bindings for --web now expose the init function. #1412

  • A js_sys::JsString::is_valid_utf16 method has been added to handle unpaired surrogates in JS strings. Surrounding documentation has also been updated to document this potential pitfall. #1416

  • A wasm_bindgen::function_table() function has been added to expose the WebAssembly.Table and get access to it in Wasm code. #1431

Fixed

  • Reexporting the wasm_bindgen macro in crates has been fixed. #1359

  • Returning u32 to JS has been fixed where large u32 values would show up in JS as large negative numbers. #1401

  • Manual instantiation with WebAssembly.Module has been fixed. #1419

  • Error message for non-Copy public struct fields has been improved. #1430

Changed

  • Performance of passing strings to Rust in Node.js has been improved. #1391

  • Performance of js_sys::try_iter has been improved. #1393

  • Performance of using TextEncoder#encodeInto has been improved. #1414

0.2.40

Released 2019-03-21.

Added

  • TypeScript and JS generation will now attempt to preserve argument names in the generated JS where possible. #1344

  • Enable Option<T> support for enums defined in WebIDL. #1350

  • Add a raw_module attribute to #[wasm_bindgen] which is the same as module except doesn't attempt to recognize ./, ../, or /` prefixed paths. #1353

  • The wasm-bindgen CLI flags have now all been renamed under a --target flag. Instead of --web you'll now pass --target web, for example. This increases consistency between the wasm-bindgen and wasm-pack CLI. #1369

Fixed

  • Definitions for TypedArray imports of js-sys have been unified with a macro to improve consistency and fix future bugs. #1371

  • Usage of --no-modules in CloudFlare workers should now work by default. #1384

  • A use-after-free when a closure is reinvoked after being destroyed on the Rust die has been fixed. #1385

  • A bug causing nondeterministic generation of JS bindings has been fixed. #1383

0.2.39

Released 2018-03-13.

Added

  • Crates can now import locally written JS snippets to get bundled into the final output. See RFC 6 for more details as well as the PR. #1295

Changed

  • A typo in the return value of slice methods on typed arrays in js-sys was corrected. #1321

  • The directory specified by --out-dir is now created if it doesn't exist already. #1330

Fixed

  • A bug where if nom was in a crate graph and was compiled with the verbose-errors feature has been fixed. Previously the wasm-bindgen-webidl crate wouldn't compile, and now it will. #1338

0.2.38

Released 2019-03-04.

Added

  • Support for Option<RustStruct> in #[wasm_bindgen] functions has now been added. #1275

  • Experimental support for the anyref type proposal in WebAssembly has now landed and is enabled with WASM_BINDGEN_ANYREF=1. #1002

  • Support for the new browser TextEncode#encodeInto API has been added. #1279

  • JS doc comments are now added to TypeScript bindings in addition to the JS bindings generated. #1302

  • Initial support for FnOnce closures has been added to the Closure type. #1281

Fixed

  • Fixed an internal assert tripping when some modules were compiled with LTO. #1274

  • The Context type in the wasm-bindgen-test crate had its JS name changed to avoid conflicts with other crates that have a Context type being exported. #1280

  • The headless test runner for Safari on macOS High Sierra has been fixed. #1298

Changed

  • The wasm-bindgen CLI tool now emits the producers section again with relevant bugs having been fixed in the meantime. The --remove-producers-section flag can continue to be used to omit emission of this section. #1263

0.2.37

Released 2019-02-15.

Added

  • The HtmlMediaElement type now exposes a src_object getter. #1248.

  • The js_sys::Reflect type now has specializes getter/setters for u32 and f64 indices. #1225.

  • A --remove-producers-section flag has been added to the CLI tool to, well, remove the producers section from the final Wasm file. #1256.

Fixed

  • The wasm-bindgen CLI tool will correctly strip DWARF debug information unless --keep-debug is passed. #1255.

Changed

  • The wasm-bindgen CLI tool no longer emits the producers custom section by default to work around a webpack bug. See #1260.

0.2.36

Released 2019-02-12.

Fixed

  • Fixed a bug where using closures and LTO together caused a panic inside the wasm-bindgen CLI tool. See #1244.

0.2.35

Released 2019-02-12.

Changed

  • wasm-bindgen now internally uses the walrus crate to perform its transformations of the Wasm that rustc/LLVM emits. See #1237.

Fixed

  • When WebAssembly.instantiateStreaming fails due to incorrect MIME type, actually properly recover. See #1243.

0.2.34

Released 2019-02-11.

Added

  • Added support for optional enums. See #1214.
  • Added the UnwrapThrowExt<T> trait, which can enable smaller code sizes for panics. See #1219.

Fixed

  • Some WebGlRenderingContext methods are now whitelisted to use shared slices instead of exclusive slices. See #1199.
  • Fixed TypeScript definitions for optional types. See #1201.
  • Quiet clippy warnings inside generated code. See 1207.
  • Fixed using cfg_attr and wasm_bindgen together like #[cfg_attr(..., wasm_bindgen)]. See 1208.
  • The WebAudio example program was fixed. See #1215.
  • Fixed logging HTML in wasm-bindgen-test. See #1233.
  • When WebAssembly.instantiateStreaming fails due to incorrect MIME type, properly recover. See #1235.

0.2.33

Released 2019-01-18.

Added

  • Improved the Debug output of JsValue #1161

  • Bindings for JSON.stringify and its optional arguments have been added #1190

Fixed

  • A bug with windows binaries being released has ben resolved.

0.2.32

Released 2019-01-16.

Added

  • Added support for Web IDL sequences. This enabled bindings generation for a couple more Web APIs. We generate functions for Web APIs that take sequences to accept any iterable, and for Web APIs that return sequences, a js_sys::Array is returned. See #1152 and #1038.
  • The wasm-bindgen-test test runner will capture console.debug, console.info, and console.warn log messages and print them to stdout now. It already supported console.log and console.error and continues to support them. See #1183 and #1184.
  • Added additional --debug-only assertions in the emitted JS glue for cases where an imported JS function that is not annotated with #[wasm_bindgen(catch)] throws an exception. This should help catch some bugs earlier! See #1179.

Fixed

  • Fixed a bug where #[wasm_bindgen_test] tests would fail in non-headless Web browsers if they used console.log. See #1167.
  • Fixed a bug where returning closures from exported functions sometimes resulted in a faulty error. See #1174 and #1175.
  • Sometimes our generated TypeScript interface files had syntax errors in them (missing semicolons). This has been fixed. See #1181.

0.2.31

Released 2019-01-09.

Added

  • A new spawn_local function has been added to the wasm-bindgen-futures crate. #1148

  • Built-in conversions are now available from typed arrays and Rust arrays. #1147

Fixed

  • Some casing of dictionary properties in WebIDL has been fixed. #1155

0.2.30

Released 2019-01-07.

Added

  • The wasm-bindgen CLI now has an --out-name argument to name the output module. #1084

  • Support for importing the default export has been added. #1106

Changed

  • All web-sys methods are now flagged as structural, fixing a few bindings. #1117

Fixed

  • A small bug with LTO and closures has been fixed. #1145

0.2.29

Released 2018-12-04.

Added

  • Add a #[wasm_bindgen(start)] attribute to customize the start section of the Wasm module. #1057

  • Add support for producing the new "producers" section of Wasm binaries #1041

  • Add support a typescript_custom_section attribute for producing custom typescript abstractions #1048

  • Generate *.d.ts files for Wasm files in addition to the JS bindings #1053

  • Add a feature to assert that all attributes in #[wasm_bindgen] are used to help catch typos and mistakes #1055

Changed

  • JS glue generation has received a few small optimizations such as removing shims and removing object allocations #1033 #1030

  • JS glue now just uses one array of JS objects instead of two #1069

Fixed

  • Fix a typo in the --no-modules generated JS #1045

0.2.28

Released 2018-11-12.

Added

  • The js_class support is now supported on exported types to define a different class in JS than is named in Rust #1012

  • More WebIDL bindings are exposed with some internal restructuring to ignore unimplemented types at a different location #1014

  • All imported types now implement Deref to their first extends attribute (or JsValue if one isn't listed). This is intended to greatly improve the ergonomics of web-sys bindings by allowing easy access to parent class methods #1019

  • A new attribute, final, can be applied to JS imports. This attribute is relatively nuanced and best explained in documentation, but is added since structural is now the default #1019

  • A new CLI flag, --remove-name-section, can be passed to remove the wasm name section which contains the names of functions for debugging (typically not needed in release mode) #1024

Changed

  • All imported functions are now structural by default. This shouldn't change the semantics of imported functions, only how they're invoked in the JS function shims that are generated by wasm-bindgen. More discussion can be founed on RFC 5 and the PR #1019
  • JS glue assertions for moved arguments are now only emitted in debug mode, which is still off by default #1020

Fixed

  • Typescript generated bindings now correctly reflect Option<T> for more types #1008

  • The JS shim code generation has been optimized for structural bindings (now the default) to include fewer JS shims and more easily optimizable for JS engines #1019

  • Passing a WebAssembly.Module to the --no-modules constructor has been fixed #1025

0.2.27

Released 2018-10-29.

Fixed

  • Fixed an internal panic where the gc passes were being too aggressive #995

0.2.26

Released 2018-10-29.

Added

  • The TypedArray.slice methods have now been bound in js-sys. #956

  • The Debug and Clone traits are now implemented for js_sys::Promise. #957

  • The js_sys::DataView type now exposes overloads to specify endianness. #966

  • When using --no-modules a WebAssembly.Module can now be directly passed into the instantiation glue. #969

Fixed

  • The JsValue type is no longer considered Send. #955

  • The generated JS glue is now more robust in the face of missing APIs. #959

  • An issue with the latest version of safaridriver used to run headless tests has been resolved. #991

0.2.25

Released 2018-10-10.

Fixed

  • Using wasm-bindgen will no longer unconditionally pull in Rust's default allocator for Wasm (dlmalloc) regardless if you configured a custom global allocator (eg wee_alloc). #947

  • Fixed web-sys build on some Windows machines. #943

  • Fixed generated ES class bindings to Rust structs that were only referenced through struct fields. #948

0.2.24

Released 2018-10-05.

Added

  • Constructors for types in web-sys should now have better documentation.

  • A new vendor_prefix attribute in #[wasm_bindgen] is supported to bind APIs on the web which may have a vendor prefix (like webkitAudioContext). This is then subsequently used to fix AudioContext usage in Safari.

  • The #[wasm_bindgen(extends = Foo)] attribute now supports full paths, so you can also say #[wasm_bindgen(extends = foo::Bar)] and such.

Changed

  • The Closure<T> type is now optimized when the underlying closure is a ZST. The type now no longer allocates memory in this situation.

  • The documentation now has a list of caveats for browser support, including how TextEncoder and TextDecoder are not implemented in Edge. If you're using webpack there's a listed strategy available, and improvements to the polyfill strategy are always welcome!

  • The BaseAudioContext and AudioScheduledSourceNode types in web-sys have been deprecated as they don't exist in Safari or Edge.

Fixed

  • Fixed the #[wasm_bindgen_test]'s error messages in a browser to correctly escape HTML-looking output.

  • WebIDL Attributes on Window are now correctly bound to not go through Window.prototype which doesn't exist but instead use a structural definition.

  • Fixed a codegen error when the BorrowMut trait was in scope.

  • Fixed TypeScript generation for constructors of classes, it was accidentally producing a syntactially invalid file!

0.2.23

Released 2018-09-26.

Added

  • This is the first release of the web-sys crate!

  • Added support for unions of interfaces and non-interfaces in the WebIDL frontend.

  • Added a policy for inclusion of new ECMAScript features in js-sys: the feature must be in stage 4 or greater for us to support it.

  • Added some documentation about size profiling and optimization with wasm-bindgen to the guide.

  • Added the Clamped<T> type for generating JavaScript Uint8ClampedArrays.

  • CI is now running on beta! Can't wait for the rustc release trains to roll over, so we can run CI on stable too!

  • Added the js_sys::try_iter function, which checks arbitrary JS values for compliance with the JS iteration protocol, and if they are iterable, converts them into an iterator over the JS values that they yield.

Changed

  • We now only generate null checks on methods on the JS side when in debug mode. For safety we will always null check on the Rust side, however.

  • Improved error messages when defining setters that don't start with set_ and don't use js_name = ....

  • Improved generated code for classes in a way that avoids an unnecessary allocation with static methods that return Self but are not the "main" constructor.

  • BREAKING: js_sys::Reflect APIs are all fallible now. This is because reflecting on Proxys whose trap handlers throw an exception can cause any of the reflection APIs to throw. Accordingly, js_sys has been bumped from 0.2.X to 0.3.X.

Fixed

  • The method of ensuring that __wbindgen_malloc and __wbindgen_free are always emitted in the .wasm binary, regardless of seeming reachability is now zero-overhead.

0.2.22

Released 2018-09-21

Added

  • The IntoIterator trait is now implemented for JS Iterator types
  • A number of variadic methods in js-sys have had explicit arities added.
  • The guide has been improved quite a bit as well as enhanced with more examples
  • The js-sys crate is now complete! Thanks so much to everyone involved to help fill out all the APIs.
  • Exported Rust functions with #[wasm_bindgen] can now return a Result where the Err payload is raised as an exception in JS.

Fixed

  • An issue with running wasm-bindgen on crates that have been compiled with LTO has been resolved.

0.2.21

Released 2018-09-07

Added

  • Added many more bindings for WebAssembly in the js-sys crate.

Fixed

  • The "names" section of the Wasm binary is now correctly preserved by wasm-bindgen.

0.2.20

Released 2018-09-06

Added

  • All of wasm-bindgen is configured to compile on stable Rust as of the upcoming 1.30.0 release, scheduled for October 25, 2018.
  • The underlying JsValue of a Closure<T> type can now be extracted at any time.
  • Initial and experimental support was added for modules that have shared memory (use atomic instructions).

Removed

  • The --wasm2asm flag of wasm2es6js was removed because the wasm2asm tool has been removed from upstream Binaryen. This is replaced with the new wasm2js tool from Binaryen.

Fixed

  • The "schema" version for wasm-bindgen now changes on all publishes, meaning we can't forget to update it. This means that the crate version and CLI version must exactly match.
  • The wasm-bindgen crate now has a links key which forbids multiple versions of wasm-bindgen from being linked into a dependency graph, fixing obscure linking errors with a more first-class error message.
  • Binary releases for Windows has been fixed.

0.2.19 (and 0.2.18)

Released 2018-08-27.

Added

  • Added bindings to js-sys for some WebAssembly types.
  • Added bindings to js-sys for some Intl types.
  • Added bindings to js-sys for some String methods.
  • Added an example of using the WebAudio APIs.
  • Added an example of using the fetch API.
  • Added more extends annotations for types in js-sys.
  • Experimental support for WeakRef was added to automatically deallocate Rust objects when gc'd.
  • Added support for executing wasm-bindgen over modules that import their memory.
  • Added a global memory() function in the wasm-bindgen crate for accessing the JS object that represent wasm's own memory.

Removed

  • Removed AsMut implementations for imported objects.

Fixed

  • Fixed the constructor and catch attributes combined on imported types.
  • Fixed importing the same-named static in two modules.

0.2.17

Released 2018-08-16.

Added

  • Greatly expanded documentation in the wasm-bindgen guide.
  • Added bindings to js-sys for Intl.DateTimeFormat
  • Added a number of extends attributes for types in js-sys

Fixed

  • Fixed compile on latest nightly with latest proc-macro2
  • Fixed compilation in some scenarios on Windows with paths in module paths

0.2.16

Released 2018-08-13.

Added

  • Added the wasm_bindgen::JsCast trait, as described in RFC #2.
  • Added the #[wasm_bindgen(extends = ...)] attribute to describe inheritance relationships, as described in RFC #2.
  • Added support for receiving Option<&T> parameters from JavaScript in exported Rust functions and methods.
  • Added support for receiving Option<u32> and other option-wrapped scalars.
  • Added reference documentation to the guide for every #[wasm_bindgen] attribute and how it affects the generated bindings.
  • Published the wasm-bindgen-futures crate for converting between JS Promises and Rust Futures.

Changed

  • Overhauled the guide's documentation on passing JS closures to Rust, and Rust closures to JS.
  • Overhauled the guide's documentation on using serde to serialize complex data to JsValue and deserialize JsValues back into complex data.
  • Static methods are now always bound to their JS class, as is required for Promise's static methods.

Removed

  • Removed internal usage of syn's visit-mut cargo feature, which should result in faster build times.

Fixed

  • Various usage errors for the #[wasm_bindgen] proc-macro are now properly reported with source span information, rather than panic!()s inside the proc-macro.
  • Fixed a bug where taking a struct by reference and returning a slice resulted in lexical variable redeclaration errors in the generated JS glue. #662
  • The #[wasm_bindgen(js_class = "....")] attribute for binding methods to renamed imported JS classes now properly works with constructors.

0.2.15

Released 2018-07-26.

Fixed

  • Fixed wasm-bindgen CLI version mismatch checks that got broken in the last point release.

0.2.14

Released 2018-07-25.

Fixed

  • Fixed compilation errors on targets that use Mach-O. #545

0.2.13

Released 2018-07-22.

Added

  • Support the #[wasm_bindgen(js_name = foo)] attribute on exported functions and methods to allow renaming an export to JS. This allows JS to call it by one name and Rust to call it by another, for example using camelCase in JS and snake_case in Rust

Fixed

  • Compilation with the latest nightly compiler has been fixed (nightlies on and after 2018-07-21)

0.2.12

Released 2018-07-19.

This release is mostly internal refactorings and minor improvements to the existing crates and functionality, but the bigs news is an upcoming js-sys and web-sys set of crates. The js-sys crate will expose all global JS bindings and the web-sys crate will be generated from WebIDL to expose all APIs browsers have. More info on this soon!

Added

  • Support for Option<T> was added where T can be a number of slices or imported types.
  • Comments in Rust are now preserved in generated JS bindings, as well as comments being generated to indicate the types of arguments/return values.
  • The online documentation has been reorganized into a book.
  • The generated JS is now formatted better by default for readability.
  • A --keep-debug flag has been added to the CLI to retain debug sections by default. This happens by default when --debug is passed.

Fixed

  • Compilation with the latest nightly compiler has been fixed (nightlies on and after 2018-07-19)
  • Declarations of an imported function in multiple crates have been fixed to not conflict.
  • Compilation with #![deny(missing_docs)] has been fixed.

0.2.11

Released 2018-05-24.

0.2.10

Released 2018-05-17.

0.2.9

Released 2018-05-11.