54 lines
1.3 KiB
TypeScript
54 lines
1.3 KiB
TypeScript
const opt = Object.prototype.toString;
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export function isArray(obj: any): obj is any[] {
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return opt.call(obj) === '[object Array]';
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}
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export function isObject(obj: any): obj is { [key: string]: any } {
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return opt.call(obj) === '[object Object]';
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}
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export function isString(obj: any): obj is string {
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return opt.call(obj) === '[object String]';
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}
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export function isNumber(obj: any): obj is number {
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return opt.call(obj) === '[object Number]' && obj === obj; // eslint-disable-line
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}
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export function isRegExp(obj: any) {
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return opt.call(obj) === '[object RegExp]';
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}
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export function isFile(obj: any): obj is File {
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return opt.call(obj) === '[object File]';
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}
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export function isBlob(obj: any): obj is Blob {
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return opt.call(obj) === '[object Blob]';
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}
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export function isUndefined(obj: any): obj is undefined {
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return obj === undefined;
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}
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export function isNull(obj: any): obj is null {
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return obj === null;
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}
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export function isFunction(obj: any): obj is (...args: any[]) => any {
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return typeof obj === 'function';
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}
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export function isEmptyObject(obj: any): boolean {
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return isObject(obj) && Object.keys(obj).length === 0;
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}
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export function isExist(obj: any): boolean {
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return obj || obj === 0;
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}
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export function isWindow(el: any): el is Window {
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return el === window;
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}
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