ut2/es/internals/getTagWithBugfix.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

import { dataViewTag, mapTag, promiseTag, setTag, weakMapTag, stringUndefined, objectTag, nativeUndefined } from './native.js';
import { toSource } from './helpers.js';
import getTag from './getTag.js';

var dataViewExisted = typeof DataView !== stringUndefined;
var mapExisted = typeof Map !== stringUndefined;
var promiseExisted = typeof Promise !== stringUndefined;
var setExisted = typeof Set !== stringUndefined;
var weakMapExisted = typeof WeakMap !== stringUndefined;
var dataViewCtorString = toSource(DataView);
var mapCtorString = toSource(Map);
var promiseCtorString = toSource(Promise);
var setCtorString = toSource(Set);
var weakMapCtorString = toSource(WeakMap);
var getTagWithBugfix = getTag;
if ((dataViewExisted && getTag(new DataView(new ArrayBuffer(1))) !== dataViewTag) ||
    (mapExisted && getTag(new Map()) !== mapTag) ||
    (promiseExisted && getTag(Promise.resolve()) !== promiseTag) ||
    (setExisted && getTag(new Set()) !== setTag) ||
    (weakMapExisted && getTag(new WeakMap()) !== weakMapTag)) {
    getTagWithBugfix = function (value) {
        var result = getTag(value);
        var Ctor = result === objectTag ? value.constructor : nativeUndefined;
        var ctorString = Ctor ? toSource(Ctor) : '';
        if (ctorString) {
            switch (ctorString) {
                case dataViewCtorString:
                    return dataViewTag;
                case mapCtorString:
                    return mapTag;
                case promiseCtorString:
                    return promiseTag;
                case setCtorString:
                    return setTag;
                case weakMapCtorString:
                    return weakMapTag;
            }
        }
        return result;
    };
}
var getTagWithBugfix$1 = getTagWithBugfix;

export { getTagWithBugfix$1 as default };