## upperFirst + [link](./upperFirst "Link to this entry.") + [source](https://github.com/lodash/lodash/blob/4.5.0正式版/lodash.src.js#L12268 "View in source.") + [npm](https://www.npmjs.com/package/lodash.upperfirst "See the npm package.") ``` _.upperFirst([string='']) ``` 转换首字母为大写。 ### 参数 1. [string=''] (string) 要转换的字符串 ### 返回值 (string) 返回转换后的字符串 ### 示例 ``` _.upperFirst('fred'); // => 'Fred' _.upperFirst('FRED'); // => 'FRED' ```