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 isPromise<T = any>(val: any): val is Promise<T> {
// update-begin--author:sunjianlei---date:20211022---for: 不能既是 Promise 又是 Object --------
return is(val, 'Promise') && isFunction(val.then) && isFunction(val.catch);
// update-end--author:sunjianlei---date:20211022---for: 不能既是 Promise 又是 Object --------
}
export function isString(val: unknown): val is string {
return is(val, 'String');
}
export function isJsonObjectString(val: string): val is string {
if (!val) {
return false;
}
return val.startsWith('{') && val.endsWith('}');
}
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 {
const reg =
/(((^https?:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+(?::\d+)?|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)
return reg.test(path);
}