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由ES规范学JavaScript(二)：深入理解“连等赋值”问题 #9

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Wscats opened this issue Apr 7, 2017 · 0 comments
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由ES规范学JavaScript(二)：深入理解“连等赋值”问题 #9

Wscats opened this issue Apr 7, 2017 · 0 comments
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Wscats commented Apr 7, 2017

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}

由ES规范学JavaScript(二)：深入理解“连等赋值”问题
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