ut2/es/internals/helpers.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

import isObjectLike from '../isObjectLike.js';
import getTag from './getTag.js';
import { argumentsTag, functionProtoToString, stringUndefined } from './native.js';

var VERSION = "1.21.2";
var isBrowser = typeof window !== stringUndefined && isObjectLike(window) && typeof document !== stringUndefined && isObjectLike(document) && window.document === document;
var supportedArgumentsType = getTag((function () { return arguments; })()) === argumentsTag;
var FUNC_ERROR_TEXT = 'Expected a function';
function toSource(func) {
    if (func !== null) {
        try {
            return functionProtoToString.call(func);
        }
        catch (err) {
        }
        try {
            return func + '';
        }
        catch (err) {
        }
    }
    return '';
}
var stubFlase = function () { return false; };
var stubTrue = function () { return true; };

export { FUNC_ERROR_TEXT, VERSION, isBrowser, stubFlase, stubTrue, supportedArgumentsType, toSource };