`${}`的用法

在 `` 中可以使用 ${} 直接把变量和字符串拼接起来

用法
step1： 定义需要拼接进去的字符串变量
step2： 将字符串变量用${}包起来，再写到需要拼接的地方

let name = '彭于晏'
 console.log( '名字为：'+name )
 console.log( `名字为：${name} ` )


let a='Karry Wang';

let str=`I love ${a}, because he is handsome.`;
//注意：这行代码是用返单号引起来的

alert(str);

参考地址:https://blog.csdn.net/qq_34246965/article/details/108085291?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522165639630516781435488372%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=165639630516781435488372&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_click~default-2-108085291-null-null.142^v24^pc_rank_34,157^v15^new_3&utm_term=%24%7B%7D&spm=1018.2226.3001.4187https://blog.csdn.net/qq_34246965/article/details/108085291?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522165639630516781435488372%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=165639630516781435488372&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_click~default-2-108085291-null-null.142^v24^pc_rank_34,157^v15^new_3&utm_term=%24%7B%7D&spm=1018.2226.3001.4187