
最佳答案

讨论数量:
var dateString = "20161013";
var year = dateString.substring(0,4);
var month = dateString.substring(4,6);
var day = dateString.substring(6,8);
var newDate = year + '-' + month + '-' + day
// "2016-10-13"
日期处理推荐使用 翻译:JavaScript 时间操作必备类库:Moment.js。