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Map[@@toStringTag] 的初始值是"Map".
Map.prototype[@@toStringTag] 属性的属性特性： |
|
|---|---|
| writable | false |
| enumerable | false |
| configurable | true |
语法
Map[Symbol.toStringTag]
示例
Object.prototype.toString.call(new Map()) // "[object Map]"
规范
| Specification | Status | Comment |
|---|---|---|
| ECMAScript 2015 (6th Edition, ECMA-262) Map.prototype[@@toStringTag] |
Standard | Initial definition. |
| ECMAScript Latest Draft (ECMA-262) Map.prototype[@@toStringTag] |
Draft |
浏览器兼容
We're converting our compatibility data into a machine-readable JSON format.
This compatibility table still uses the old format,
because we haven't yet converted the data it contains.
Find out how you can help!
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 44.0 | 未实现 | 未实现 | 未实现 | 未实现 |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | 未实现 | 44.0 | 未实现 | 未实现 | 未实现 | 未实现 | 44.0 |