数组中某个字段逗号隔开拼接

let str = ""

let arr = [{

name:'zs',

age:23

},{

name:'ls',

age:23

}]

for(let i in arr) {

str+=arr[i].name + ",";

}

if(str.length > 0) {

str = str.substr(0, str.length - 1);

}

console.log(str)