clear()
method removes all elements from a
Set
对象。
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mySet.clear();
clear
方法
var mySet = new Set();
mySet.add(1);
mySet.add('foo');
mySet.size; // 2
mySet.has('foo'); // true
mySet.clear();
mySet.size; // 0
mySet.has('bar') // false
| 规范 |
|---|
|
ECMAScript (ECMA-262)
The definition of 'Set.prototype.clear' in that specification. |
| Desktop | Mobile | Server | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
clear
|
Chrome 38 | Edge 12 | Firefox 19 | IE 11 | Opera 25 | Safari 8 | WebView Android 38 | Chrome Android 38 | Firefox Android 19 | Opera Android 25 | Safari iOS 8 | Samsung Internet Android 3.0 | nodejs 0.12 |
完整支持
Set
Function
Object
Object.prototype.__defineGetter__()
Object.prototype.__defineSetter__()
Object.prototype.__lookupGetter__()
Object.prototype.__lookupSetter__()
Object.prototype.hasOwnProperty()
Object.prototype.isPrototypeOf()
Object.prototype.propertyIsEnumerable()
Object.prototype.toLocaleString()
Object.prototype.toSource()
Object.prototype.toString()
Object.prototype.valueOf()
Object.setPrototypeOf()