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深入浅出Javascript闭包
source link: https://juejin.im/post/5beee511e51d453b8e543ed6
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一、引子 闭包（closure）是 Javascript 语言的一个难点，面试时常被问及，也是它的特色，很多高级应用都要依靠闭包实现。本文尽可能用简单易懂的话，讲清楚闭包的概念、形成条件及其常见的面试题。 我们先来看一个例子： var n = 999; fu
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