npm install itheima-tools
const itheima = require('itheima-tools')
//调用 dateFormat 对时间进行格式化
const dtStr = itheima.dateFormat(new Date())
//结果 2022-05-10 19:13:52
console.log(dtStr)
//带转换的 html 字符串
const htmlstr = '<h1 title = "abc">这是h1标签<span>123 </span></h1>'
//调用htmlEscape 方法进行转换
const str = itheima.htmlEscape(htmlstr)
//结果是 <h1 title = "abc">这是h1标签<span>123&nbsp</span></h1>
console.log(str)
//待还原的 html 字符串
const str2 = itheima.htmlUnEscape(str)
//输出结果 <h1 title = "abc">这是h1标签<span>123 </span></h1>
console.log(str2)
ISC