---初始化后台管理web页面项目

src/utils/is.ts

@@ -0,0 +1,131 @@
+const toString = Object.prototype.toString;
+
+export function is(val: unknown, type: string) {
+  return toString.call(val) === `[object ${type}]`;
+}
+
+export function isDef<T = unknown>(val?: T): val is T {
+  return typeof val !== 'undefined';
+}
+
+export function isUnDef<T = unknown>(val?: T): val is T {
+  return !isDef(val);
+}
+
+export function isObject(val: any): val is Record<any, any> {
+  return val !== null && is(val, 'Object');
+}
+
+export function isEmpty<T = unknown>(val: T): val is T {
+  if (isArray(val) || isString(val)) {
+    return val.length === 0;
+  }
+
+  if (val instanceof Map || val instanceof Set) {
+    return val.size === 0;
+  }
+
+  if (isObject(val)) {
+    return Object.keys(val).length === 0;
+  }
+
+  return false;
+}
+
+export function isDate(val: unknown): val is Date {
+  return is(val, 'Date');
+}
+
+export function isNull(val: unknown): val is null {
+  return val === null;
+}
+
+export function isNullAndUnDef(val: unknown): val is null | undefined {
+  return isUnDef(val) && isNull(val);
+}
+
+export function isNullOrUnDef(val: unknown): val is null | undefined {
+  return isUnDef(val) || isNull(val);
+}
+
+export function isNumber(val: unknown): val is number {
+  return is(val, 'Number');
+}
+
+export function stringIsNumber(val) {
+  const regPos = /^\d+(\.\d+)?$/; //非负浮点数
+  const regNeg =
+    /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; //负浮点数
+  if (regPos.test(val) || regNeg.test(val)) {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+export function isPromise<T = any>(val: unknown): val is Promise<T> {
+  return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch);
+}
+
+export function isString(val: unknown): val is string {
+  return is(val, 'String');
+}
+
+export function isFunction(val: unknown): val is Function {
+  return typeof val === 'function';
+}
+
+export function isBoolean(val: unknown): val is boolean {
+  return is(val, 'Boolean');
+}
+
+export function isRegExp(val: unknown): val is RegExp {
+  return is(val, 'RegExp');
+}
+
+export function isArray(val: any): val is Array<any> {
+  return val && Array.isArray(val);
+}
+
+export function isWindow(val: any): val is Window {
+  return typeof window !== 'undefined' && is(val, 'Window');
+}
+
+export function isElement(val: unknown): val is Element {
+  return isObject(val) && !!val.tagName;
+}
+
+export function isMap(val: unknown): val is Map<any, any> {
+  return is(val, 'Map');
+}
+
+export const isServer = typeof window === 'undefined';
+
+export const isClient = !isServer;
+
+export function isUrl(path: string): boolean {
+  if (!path.includes('//')) return false;
+
+  const urlRegex = /^(ftp|http|https):\/\/[^ "]+$/;
+
+  return urlRegex.test(path);
+
+  // const sRegex =
+  //   '^((https|http|ftp|rtsp|mms)?://)' +
+  //   "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" + //ftp的user@
+  //   '(([0-9]{1,3}.){3}[0-9]{1,3}' + // IP形式的URL- 199.194.52.184
+  //   '|' + // 允许IP和DOMAIN（域名）
+  //   "([0-9a-z_!~*'()-]+.)*" + // 域名- www.
+  //   '([0-9a-z][0-9a-z-]{0,61})?[0-9a-z].' + // 二级域名
+  //   '[a-z]{2,6})' + // first level domain- .com or .museum
+  //   '(:[0-9]{1,4})?' + // 端口- :80
+  //   '((/?)|' + // a slash isn't required if there is no file name
+  //   "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$";
+  // const re = new RegExp(sRegex);
+  // return re.test(path);
+  // const reg =
+  //   /^(?:(http|https|ftp):\/\/)?((?:[\w-]+\.)+[a-z0-9]+)((?:\/[^/?#]*)+)?(\?[^#]+)?(#.+)?$/i;
+  // // const reg =
+  // //   /(((^https?:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+(?::\d+)?|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)$/;
+  // return reg.test(path);
+}