> For the complete documentation index, see [llms.txt](https://mm.ricky.moe/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mm.ricky.moe/other/zheng-ze/ti-mu/yong-zheng-ze-shi-xian-trim-qing-chu-zi-fu-chuan-liang-duan-kong-ge.md).

# 用正则实现trim() 清除字符串两端空格

```javascript
function trim(str) {
    return str.replace(/(^\s*)|(\s*$)/g, "")
}
```