truncate
最后更新于：2022-04-02 00:07:49
## truncate
+ [link](./truncate "Link to this entry.")
+ [source](https://github.com/lodash/lodash/blob/4.5.0正式版/lodash.src.js#L12942 "View in source.")
+ [npm](https://www.npmjs.com/package/lodash.truncate "See the npm package.")
```
_.truncate([string=''], [options])
```
截断字符串，如果字符串超出了限定的最大值。 被截断的字符串后面会以 `omission` 代替，`omission` 默认是 "..."。
### 参数
1. [string=''] (string)
要截断的字符串
2. [options] (Object)
选项对象
3. [options.length=30] (number)
允许的最大长度
4. [options.omission='...'] (string)
超出后的代替字符
5. [options.separator] (RegExp|string)
截断点
### 返回值 (string)
返回截断后的字符串
### 示例
```
_.truncate('hi-diddly-ho there, neighborino');
// => 'hi-diddly-ho there, neighbo...'
_.truncate('hi-diddly-ho there, neighborino', {
'length': 24,
'separator': ' '
});
// => 'hi-diddly-ho there,...'
_.truncate('hi-diddly-ho there, neighborino', {
'length': 24,
'separator': /,? +/
});
// => 'hi-diddly-ho there...'
_.truncate('hi-diddly-ho there, neighborino', {
'omission': ' [...]'
});
// => 'hi-diddly-ho there, neig [...]'
```
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