trimEnd()
方法从一个字符串的末端移除空白字符。trimRight() 是这个方法的别名。
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语法
str.trimEnd();
str.trimRight();
返回值
一个新字符串,表示从调用字串的末(右)端除去空白。
描述
trimEnd()
/ trimRight()
方法移除原字符串右端的连续空白符并返回,trimEnd()
/ trimRight()
方法并不会直接修改原字符串本身。
别名
为了与 String.prototype.padEnd
等函数保持一致,标准方法名称为trimEnd
。 但是,出于Web兼容性原因,trimRight
仍然是trimEnd
的别名。 在某些引擎中,这意味着:
String.prototype.trimRight.name === "trimEnd";
示例
使用trimEnd()
下面的例子输出了小写的字符串" foo":
var str = " foo "; alert(str.length); // 8 str = str.trimRight(); // 或写成str = str.trimEnd(); console.log(str.length); // 6 console.log(str); // ' foo'
Specifications
Specification | Status | Comment |
---|---|---|
String.prototype.{trimStart,trimEnd} proposal |
Stage 4 | Expected to be part of ES2019 |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
trimEnd |
Chrome Full support 66
|
Edge Full support 12
|
Firefox Full support 61
|
IE No support No | Opera Full support 53
|
Safari Full support 12 | WebView Android Full support 66
|
Chrome Android Full support 66
|
Firefox Android Full support 61
|
Opera Android Full support 47
|
Safari iOS Full support 12 | Samsung Internet Android Full support 9.0
|
nodejs Full support 10.0.0
|
Legend
- Full support
- Full support
- No support
- No support
- Uses a non-standard name.
- Uses a non-standard name.