npm install itheima-tools
const itheima = require('itheima-tl')
//调用dataFormat 对时间进行格式化
const itheima = require('./itheima-tl')
const dt = itheima.dateFormat(new Date())
console.log(dt)
//带转换的 HTML 字符串
const htmlStr = '<h1 title="abc">这是h1标签<span>123 </span></h1>'
const str = itheima.htmlEscape(htmlStr)
//转换结果:<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)
//输出的结果:<h1 title="abc">这是h1标签<span>123&;nbsp;</span></h1>
console.log(str2)
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