拼接字符串的几个常用方法

1. 最常用的加号运算符

let date='2023-03-15',
let time='17:50'
console.log(date+' '+time) //2023-03-15 17:50

2.es6的反引号``

let date='2023-03-15',
let time='17:50'
console.log(`${date} ${time}`) //2023-03-15 17:50

3.兼容好点的es5（concate）

let date='2023-03-15',
let time='17:50'
console.log(date.concat(' ', time)) //2023-03-15 17:50

4. 数组的join

let date='2023-03-15',
let time='17:50'
console.log([date, time].join(' ')) //2023-03-15 17:50

OK，就这样，End~