记` `模板字符串使用

let str = `<ul>
			<li>a</li>
			<li>b</li>
			</ul>`
			
console.log(str)

let str2 = '你是'
let str3 = '个好人'

let res = str2 + str3
console.log(res);//你是个好人

let res2 = `${str2}个好人2`;
console.log(res2);// 你是个好人2