> For the complete documentation index, see [llms.txt](https://gyx8899.gitbook.io/blog/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gyx8899.gitbook.io/blog/docs/console.md).

# Console

## 不常用，但非常有用的 `API`

* clear: 清屏

```javascript
console.clear();
```

* time: 测试代码片段执行的时间。

```javascript
console.time('Loop event');
let count = 0;
for (let i = 0; i < 1000; i++) {
    count += i;
}
console.timeEnd('Loop event');
// Loop event: 0.043212890625ms
```

* 查看 jQuery 的版本号方法

```javascript
jQuery().jquery
jQuery.fn.jquery
$.fn.jquery
```