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20190104-姚强 #9

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yaofly2012 opened this issue Jan 4, 2019 · 0 comments

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yaofly2012 commented Jan 4, 2019 •

edited

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理解new的执行过程

function A() {}
A.prototype.n = 1;
var b = new A();
A.prototype = {
    n: 2,
    m: 3
}
var c = new A();
console.log(b.n, b.m, c.n, c.m)  // 猜猜输出什么

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