tiu5

// 防抖
const debounce = (fn, wait = 50) => {
  let timer = null
  return function (...args) {
    clearTimeout(timer)
    timer = setTimeout(() => {
      fn.apply(this, args)
    }, wait)
  }
}

tiu5

<input type="file" id="flie" name="file"/>
<script>
  const file = document.getElementById('flie')

	file.onchange = function(e) {
		const f = this.files[0]

		const formData = new FormData()
		formData.append("file", f)

tiu5

<span id="pwd_spn" class="password-span">Test</span>
<button id="cp_btn">Copy</button>

<script>
document.getElementById("cp_btn").addEventListener("click", copy_password);

function copy_password() {
    var copyText = document.getElementById("pwd_spn");
    var textArea = document.createElement("textarea");
    textArea.value = copyText.textContent;

tiu5

const fs = require('fs')
const path = './Photoshop 人物肖像全面修饰实例教程'
const replaceStr = '【doyoudo全部课程都有 微信sgyx1120】'

try {
  const files = fs.readdirSync(path)
  files.map(item => {
    const oldPath = `${path}/${item}`
    const newPath = `${path}/${item.replace(replaceStr, '')}`
    fs.rename(oldPath, newPath, err => { throw err})

tiu5

错误信息获得三点：

• 错误发生在哪一行
• 什么类型的错误
• 错误信息是什么

错误类型：

• SyntaxError: 语法错误
• ReferenceError: 使用了不存在的变量

tiu5

var funDownload = function (content, filename) { 
// 创建隐藏的可下载链接 
var eleLink = document.createElement('a'); 
eleLink.download = filename; 
eleLink.style.display = 'none'; 
// 字符内容转变成blob地址 
var blob = new Blob([JSON.stringify(content)]); 
eleLink.href = URL.createObjectURL(blob); 
// 触发点击 
document.body.appendChild(eleLink); 

tiu5

html {
  font-size: -webkit-calc(100vw/7.5);
  font-size: calc(100vw/7.5);
}

tiu5

/**
 * @description The method will send a Ajax request with Promise.
 * @param {String} url 
 * @return {Promise}
 */

function get(url) {

    return new Promise((resolve, reject) => {
        let req = new XMLHttpRequest()