JSON.stringify 转化普通数组为空的原因

JSON.stringify() 把 JavaScript 对象转换为字符串。

let list = [];
list['a'] = ['1','2','3','4'];
alert(JSON.stringify(list));
//结果为：[]let list = {};
list['a'] = ['a','b','c','d'];
alert(JSON.stringify(list));
//结果为：{a:["a","b","c","d"]}