1、字符串pinjie
var completeId = 1;
var idName = "conplete-info"+completeId;
console.log(typeof idName); //string
var completeId = 'ss';
var idName = "conplete-info"+completeId;
console.log(typeof idName); //string
var completeId = ss;
var idName = "conplete-info"+completeId;
console.log(typeof idName); //报错