itheima-tools-hey

const itheima =require('itheima-tools-hey')

const dtStr =itheima.dataFormat(new Date())
console.log(dtStr)

const htmlStr='<h1 title="abc">h1标签&nbsp;</h1>';
const str=itheima.htmlEscape(htmlStr);
//转换结果&lt;h1 title=&quot;abc&quot;&gt;h1标签&amp;nbsp;&lt;/h1&gt;  

const str2= itheima.htmlUnEscape(str);
console.log(str2);
//<h1 title="abc">h1标签&nbsp;</h1>