toUpper
最后更新于：2022-04-02 00:07:40
## toUpper
+ [link](./toUpper "Link to this entry.")
+ [source](https://github.com/lodash/lodash/blob/4.5.0正式版/lodash.src.js#L12796 "View in source.")
+ [npm](https://www.npmjs.com/package/lodash.toupper "See the npm package.")
```
_.toUpper([string=''])
```
转换整体的字符串为大写
### 参数
1. [string=''] (string)
要转换的字符串
### 返回值 (string)
返回大写的字符串
### 示例
```
_.toUpper('--foo-bar');
// => '--FOO-BAR'
_.toUpper('fooBar');
// => 'FOOBAR'
_.toUpper('__foo_bar__');
// => '__FOO_BAR__'
```
';