Mirrors/lodash
1
0
Fork 0
mirror of https://github.com/whoisclebs/lodash.git synced 2026-02-06 09:47:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

Bump to v4.3.0.

Browse Source
This commit is contained in:
John-David Dalton
2016-02-07 23:23:22 -08:00
parent f18e5950b9
commit 8bff780a94
44 changed files with 347 additions and 75 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
_getTag.js
View File

@@ -1,10 +1,12 @@
import Map from './_Map';
import Set from './_Set';
import WeakMap from './_WeakMap';
/** `Object#toString` result references. */
var mapTag = '[object Map]',
objectTag = '[object Object]',
setTag = '[object Set]';
setTag = '[object Set]',
weakMapTag = '[object WeakMap]';
/** Used for built-in method references. */
var objectProto = Object.prototype;
@@ -18,9 +20,10 @@ var funcToString = Function.prototype.toString;
*/
var objectToString = objectProto.toString;
/** Used to detect maps and sets. */
/** Used to detect maps, sets, and weakmaps. */
var mapCtorString = Map ? funcToString.call(Map) : '',
setCtorString = Set ? funcToString.call(Set) : '';
setCtorString = Set ? funcToString.call(Set) : '',
weakMapCtorString = WeakMap ? funcToString.call(WeakMap) : '';
/**
* Gets the `toStringTag` of `value`.
@@ -33,19 +36,20 @@ function getTag(value) {
return objectToString.call(value);
}
// Fallback for IE 11 providing `toStringTag` values for maps and sets.
if ((Map && getTag(new Map) != mapTag) || (Set && getTag(new Set) != setTag)) {
// Fallback for IE 11 providing `toStringTag` values for maps, sets, and weakmaps.
if ((Map && getTag(new Map) != mapTag) ||
(Set && getTag(new Set) != setTag) ||
(WeakMap && getTag(new WeakMap) != weakMapTag)) {
getTag = function(value) {
var result = objectToString.call(value),
Ctor = result == objectTag ? value.constructor : null,
ctorString = typeof Ctor == 'function' ? funcToString.call(Ctor) : '';
if (ctorString) {
if (ctorString == mapCtorString) {
return mapTag;
}
if (ctorString == setCtorString) {
return setTag;
switch (ctorString) {
case mapCtorString: return mapTag;
case setCtorString: return setTag;
case weakMapCtorString: return weakMapTag;
}
}
return result;