由ES规范学JavaScript(二)：深入理解“连等赋值”问题

Question

Wscats opened this issue 8 years ago · 0 comments

有这样一个热门问题：

var a = {n: 1};
var b = a;
a.x = a = {n: 2};
alert(a.x); // --> undefined
alert(b.x); // --> {n: 2}