diff --git a/libs/kitify/config.mjs b/libs/kitify/config.mjs
new file mode 100644
index 0000000..1da2592
--- /dev/null
+++ b/libs/kitify/config.mjs
@@ -0,0 +1,15 @@
+export default {
+	input: [
+		{
+			input: 'src/index.ts',
+			name: 'kitify',
+		},
+		{
+			input: 'src/type.ts',
+			name: 'kitifyType',
+		},
+	],
+	formats: ['cjs', 'esm', 'umd'],
+	target: ['es2015', 'es5'],
+	outDir: 'dist',
+}
diff --git a/libs/kitify/index.js b/libs/kitify/index.js
deleted file mode 100644
index 0bb58d3..0000000
--- a/libs/kitify/index.js
+++ /dev/null
@@ -1,3 +0,0 @@
-export function assign(...args) {
-	return Object.assign(...args)
-}
diff --git a/libs/kitify/package.json b/libs/kitify/package.json
index 14ee735..56da49d 100644
--- a/libs/kitify/package.json
+++ b/libs/kitify/package.json
@@ -2,17 +2,23 @@
 	"name": "kitify",
 	"version": "0.0.7",
 	"description": "kitify is a JavaScript utility library that provides a whole mess of useful helper functions and supports modularity.",
-	"type": "module",
 	"main": "dist/index.js",
+	"module": "dist/index.mjs",
 	"unpkg": "dist/index.min.js",
 	"jsdelivr": "dist/index.min.js",
 	"types": "dist/index.d.ts",
 	"exports": {
 		".": {
 			"types": "./dist/index.d.ts",
-			"import": "./dist/index.js",
-			"module": "./dist/index.js",
-			"require": "./dist/index.cjs"
+			"import": "./dist/index.mjs",
+			"module": "./dist/index.mjs",
+			"require": "./dist/index.js"
+		},
+		"./type": {
+			"types": "./dist/type.d.ts",
+			"import": "./dist/type.mjs",
+			"module": "./dist/type.mjs",
+			"require": "./dist/type.js"
 		},
 		"./*": "./dist/*"
 	},
@@ -30,7 +36,6 @@
 	"keywords": [
 		"kitify",
 		"kit",
-		"JavaScript kit",
 		"utility",
 		"functions",
 		"lodash"
diff --git a/libs/kitify/src/index.ts b/libs/kitify/src/index.ts
new file mode 100644
index 0000000..b26944f
--- /dev/null
+++ b/libs/kitify/src/index.ts
@@ -0,0 +1 @@
+export * from './type'
diff --git a/libs/kitify/src/type.ts b/libs/kitify/src/type.ts
new file mode 100644
index 0000000..7e9dd08
--- /dev/null
+++ b/libs/kitify/src/type.ts
@@ -0,0 +1,36 @@
+export function isType(value: any, type?: string): string | boolean {
+	const valType = Object.prototype.toString.call(value).slice(8, -1).toLowerCase()
+	if (type && typeof type === 'string') {
+		return valType === type.toLowerCase()
+	}
+	return valType
+}
+
+export const isString = (value: any) => typeof value === 'string'
+export const isNumber = (value: any) => typeof value === 'number'
+export const isBoolean = (value: any) => typeof value === 'boolean'
+export const isArray = (value: any) => Array.isArray(value)
+export const isFunction = (value: any) => typeof value === 'function'
+export const isSymbol = (value: any) => typeof value === 'symbol'
+export const isBigInt = (value: any) => typeof value === 'bigint'
+export const isObject = (value: any) => isType(value, 'object')
+
+export const isNil = (value: any) => value === null || value === undefined
+
+export const isEmpty = (value: any) => {
+	if (isNil(value)) {
+		return true
+	}
+	if (typeof value === 'string') {
+		return value.trim() === ''
+	}
+	if (Array.isArray(value)) {
+		return value.length === 0
+	}
+	if (typeof value === 'object') {
+		return Object.keys(value).length === 0
+	}
+	return false
+}
+
+export const isInvalid = (value: any) => isNil(value) || Number.isNaN(value)
diff --git a/scripts/build.js b/scripts/build.js
index 23a84ed..219ba6a 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -18,9 +18,10 @@ const args = minimist(process.argv.slice(2))
 const watchMode = args.watch
 const PROD = !args.watch
 
-async function readLibConfig(libPath) {
+async function readLibConfig(libPath, type) {
 	try {
-		const { default: result } = await import(path.join(libPath, BUILD_LIB_CONFIG_FILE))
+		const _path = path.join(libPath, BUILD_LIB_CONFIG_FILE + (type === 'module' ? '.js' : '.mjs'))
+		const { default: result } = await import(_path)
 		if (typeof result === 'function') {
 			return await Promise.resolve().then(result)
 		} else {
@@ -60,8 +61,8 @@ function generateConfig(input, config = {}, pkg, cli = {}) {
 
 async function getLibConfig(libName, cli = {}) {
 	const libPath = getLibPath(libName)
-	const _config = await readLibConfig(libPath)
 	const libPkg = await readPackage(libPath)
+	const _config = await readLibConfig(libPath, libPkg.type)
 
 	const userConfig = _config || libPkg[BUILD_LIB_CONFIG_KEY] || {}
 	const libInput = cli.input || userConfig.input || './src/index.ts'
diff --git a/scripts/const.js b/scripts/const.js
index a0f8b83..e46af86 100644
--- a/scripts/const.js
+++ b/scripts/const.js
@@ -12,7 +12,7 @@ export const BUILD_MODULES = ['libs/*/package.json'] // 所有的构建模块
 export const BUILD_BROWSERSLIST = '> 0.25%, not dead'
 export const BUILD_TS_TARGET = ['es2018', 'es2015']
 export const BUILD_FORMATS = ['esm', 'cjs', 'umd']
-export const BUILD_LIB_CONFIG_FILE = 'config.js' // 构建配置文件
+export const BUILD_LIB_CONFIG_FILE = 'config' // 构建配置文件
 export const BUILD_LIB_CONFIG_KEY = 'buildOptions' // package.json 中的构建配置
 
 /**