iterator接口 ...和for of依赖的关键
摘要:
let arr = { 0: 1, 1: 2, 2: 3, length: 3 }; // arr[Symbol.iterator]=[][Symbol.iterator]; arr[Symbol.iterator] = function() { var tem = { index: 0, }; //this指向的是arr var len = th... 阅读全文
posted @ 2018-10-28 14:34 偏灬爱 阅读(121) 评论(0) 推荐(0) 编辑