web-opds-client

JavaScript OPDS web client

Standalone App

OPDS Web Client can be run as a standalone app mounted in a DOM element:

new OPDSWebClient(config, elementId);

For an example of OPDS Web Client in use as a standalone app, see the demo server template included in this repository.

NOTE: The web reader has been taken out of the demo server template for now as it is causing build issues. If you want to install it locally and use it for testing, uncomment line 17 in /packages/server/index.js, and install it in the /packages/server directory:

 $ npm install --save nypl-simplified-webpub-viewer

Standalone Config Options

• pathFor(collectionUrl: string, bookUrl: string) => string: required function that accepts a collection URL and book URL and returns a string that will become the web browser's relative URL upon navigating to a new collection or book
• pathPattern: a react-router path pattern representing how to map a web browser URL to a collectionUrl and bookUrl. Default: /(collection/:collectionUrl/)(book/:bookUrl/)
• collectionUrl: optional initial URL of an OPDS feed to load. Default: null (allow user to enter URL)
• bookUrl: optional initial URL of an OPDS Entry to load. Default: null
• proxyUrl: optional local proxy path to which all remote URLs will be posted. Default: undefined
• pageTitleTemplate(collectionTitle: string, bookTitle: string) => string: optional function that accepts a collection and book title and returns an HTML page title. Default: undefined
• authPlugins: optional list of objects that implement the AuthPlugin interface. Default: BasicAuthPlugin
• computeBreadcrumbs: optional function for customizing breadcrumbs. It defaults to defaultComputeBreadcrumbs in the Breadcrumbs module, and hierarchyComputeBreacrumbs is also available. It should return an array of link objects, each with url and text properties. Its accepts two arguments:
  • collection: object representing the current collection data (see CollectionData in the interfaces file)
  • history: an array of link objects (each with url and text properties) that is appended every time the user navigates to a new collection
• epubReaderUrlTemplate(epubUrl: string) => string: optional function that returns a URL where you can read an EPUB file.
• allLanguageSearch: optional string to specify if searches in the catalog should not use the browser's language header in requests. Default: false

React Component

The application is also available as a reusable React component:

import OPDSCatalog from "web-opds-client";

ReactDOM.render(
  <OPDSCatalog
    collectionUrl={this.props.collectionUrl}
    bookUrl={this.props.bookUrl}
    pageTitleTemplate={this.pageTitleTemplate}
    BookDetailsContainer={BookDetailsContainer}
    Header={Header}
  />
);

For an example of the application in use as a React component, see ThePalaceProject/circulation-admin.

React Component Props

• collectionUrl: optional URL of an OPDS Acquisition or Navigation feed to load. Default: null
• bookUrl: optional URL of an OPDS Entry to load. Default: null
• pageTitleTemplate(collectionTitle: string, bookTitle: string) => string: optional function that accepts a collection and book title and returns an HTML page title. Default: undefined
• Header: optional custom React component class to render in place of the client's default header. This Header will receive three props, collectionTitle, bookTitle, and a CatalogLink which should be used for links to collections or books that the client should load, and one child, a Search component that will only be present when the loaded collection links to an Open Search Description document. Default: undefined
• BookDetailsContainer: optional custom React component class to render in place of the client's default BookDetails component. This BookDetailsContainer will receive three props: the current collectionUrl and bookUrl, and refreshCatalog, a function that can be called to refresh the collection and/or book. BookDetailsContainer will also receive the default rendered BookDetails component as a child. Default: undefined
• authPlugins: same as in "Standalone Config Options" above
• computeBreadcrumbs: same as in "Standalone Config Options" above
• epubReaderUrlTemplate: same as in "Standalone Config Options" above

React Component Context

The OPDSCatalog React component should be rendered within a React context that includes two items:

• router: any object that implements the push and createHref methods of react-router's context.router
• pathFor(collectionUrl: string, bookUrl: string) => string: a function that accepts a collection URL and book URL and returns a string that will become the web browser's relative URL upon navigating to a new collection or book

Accessibility

In order to develop user interfaces that are accessible to everyone, there are tools added to the workflow. Besides the Typescript tslint-react-a11y plugin (in /packages/web-opds-client/tslint.json), react-axe is also installed for local development. Using that module while running the app uses a lot of resources so it should be only when specifically testing for accessibility and not while actively developing new features or fixing bugs.

In order to run the app with react-axe, run npm run dev-test-axe. This will add a local global variable process.env.TEST_AXE (through webpack) that will trigger react-axe in /packages/web-opds-client/src/app.tsx. The output will be seen in the browser's console terminal.

License

Copyright © 2015 The New York Public Library, Astor, Lenox, and Tilden Foundations

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.