雾徊

```js const fullscreen = (mode = true, el = 'body') => (mode ? document.querySelector(el).requestFul

```js const addStyles = (el, styles) => Object.assign(el.style, styles); addStyles(document.getEleme

```js const copyToClipboard = str => { if (navigator && navigator.clipboard && navigator.clipboard.w

```js const onClickOutside = (element, callback) => { document.addEventListener('click', e => { if (

```js const smoothScroll = element => document.querySelector(element).scrollIntoView({ behavior: 'sm

--- theme: juejin --- ```js const getAncestors = el => { let ancestors = []; while (el) { ancestors.

```js const elementContains = (parent, child) => parent !== child && parent.contains(child); element

```js const isAbsolutePath = str => /^[a-z][a-z0-9+.-]*:/.test(str); isAbsolutePath('/user'); // fal

1. 使用 filter、concat 来计算 2. 使用拓展运算符（...）、Set 的特性来计算