JavaScript - 🤍

```js const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase()); consol

根据每项的 parent_id，生成具体树状结构的对象。 简化代码 代码解说............

```js /** * @param { string } str 待转换的字符串 * @param { number } type 1-全大写 2-全小写 3-首字母大写 其他-不转换 */ exp

```js const outOfNum = (val, maxNum) => { val = val ? val - 0 : 0; if (val > maxNum) { return `${max

```js /** * @param { string } str 待处理字符串 * @param { number } type 去除空格类型 1-所有空格 2-前后空格 3-前空格 4-后空格 默

```js function subText(str, length) { if (str.length === 0) { return ''; } if (str.length > length)

```js function type(target) { const ret = typeof target; const template = { '[object Array]': 'array

```js const formatMoney = num => num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ','); formatMoney(1

```js const detectLanguage = (defaultLang = 'en-US') => navigator.language || (Array.isArray(navigat

```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 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

验证字符串非空、验证是否为纳税人识别号/统一社会信用代码、验证银行卡号长度是否正确、验证数字(double类型) [可以包含负号和小数点、大于等于0，并精确到小数点后两位、验证整数、验证非负整数 等等