初始化项目，自 v1.7.1 版本开始

src/utils/is.ts

@@ -0,0 +1,105 @@
+// copy to vben-admin
+
+const toString = Object.prototype.toString
+
+export const is = (val: unknown, type: string) => {
+  return toString.call(val) === `[object ${type}]`
+}
+
+export const isDef = <T = unknown>(val?: T): val is T => {
+  return typeof val !== 'undefined'
+}
+
+export const isUnDef = <T = unknown>(val?: T): val is T => {
+  return !isDef(val)
+}
+
+export const isObject = (val: any): val is Record<any, any> => {
+  return val !== null && is(val, 'Object')
+}
+
+export const isEmpty = <T = unknown>(val: T): val is T => {
+  if (isArray(val) || isString(val)) {
+    return val.length === 0
+  }
+
+  if (val instanceof Map || val instanceof Set) {
+    return val.size === 0
+  }
+
+  if (isObject(val)) {
+    return Object.keys(val).length === 0
+  }
+
+  return false
+}
+
+export const isDate = (val: unknown): val is Date => {
+  return is(val, 'Date')
+}
+
+export const isNull = (val: unknown): val is null => {
+  return val === null
+}
+
+export const isNullAndUnDef = (val: unknown): val is null | undefined => {
+  return isUnDef(val) && isNull(val)
+}
+
+export const isNullOrUnDef = (val: unknown): val is null | undefined => {
+  return isUnDef(val) || isNull(val)
+}
+
+export const isNumber = (val: unknown): val is number => {
+  return is(val, 'Number')
+}
+
+export const isPromise = <T = any>(val: unknown): val is Promise<T> => {
+  return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch)
+}
+
+export const isString = (val: unknown): val is string => {
+  return is(val, 'String')
+}
+
+export const isFunction = (val: unknown): val is Function => {
+  return typeof val === 'function'
+}
+
+export const isBoolean = (val: unknown): val is boolean => {
+  return is(val, 'Boolean')
+}
+
+export const isRegExp = (val: unknown): val is RegExp => {
+  return is(val, 'RegExp')
+}
+
+export const isArray = (val: any): val is Array<any> => {
+  return val && Array.isArray(val)
+}
+
+export const isWindow = (val: any): val is Window => {
+  return typeof window !== 'undefined' && is(val, 'Window')
+}
+
+export const isElement = (val: unknown): val is Element => {
+  return isObject(val) && !!val.tagName
+}
+
+export const isMap = (val: unknown): val is Map<any, any> => {
+  return is(val, 'Map')
+}
+
+export const isServer = typeof window === 'undefined'
+
+export const isClient = !isServer
+
+export const isUrl = (path: string): boolean => {
+  const reg =
+    /(((^https?:(?:\/\/)?)(?:[-:&=\+\$,\w]+@)?[A-Za-z0-9.-]+(?::\d+)?|(?:www.|[-:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&%@.\w_]*)#?(?:[\w]*))?)$/
+  return reg.test(path)
+}
+
+export const isDark = (): boolean => {
+  return window.matchMedia('(prefers-color-scheme: dark)').matches
+}