JavaScript闭包垃圾回收的相关内容

文章 2024-07-02 来自：开发者社区

前端 JS 经典：闭包与内存泄漏、垃圾回收

1. 闭包函数嵌套函数，内部函数可以引用外部函数的参数和变量。参数和变量不会被垃圾回收机制收回。 2. 垃圾回收机制什么是垃圾？就是不再需要的内存。什么是垃圾回收机制？就是浏览器会自动回收掉我们不要的数据。那浏览器怎么判断什么是我们不要的数据？就是我们无法触达的数据，也就是访问不到的数据。 3. 内存泄漏有些数据是我们不要的，但是还能被访问，被触达。...

文章 2023-07-06 来自：开发者社区

闭包，作用域链，垃圾回收，内存泄露1、函数创建创建函数 1、开辟一个堆内存(16进制的内存地址) 2、声明当前函数的作用域（再哪个上下文创建的，它的作用域就是谁） 3、把函数体内的代码当作字符串存储在堆内存当中(所以不执行没有意义) 4、把函数的堆内存地址类似对象一样放到栈中供对象调用执行函数 1、会形成一个全新的私有上下文(目的是供函数中的代码执行)，然后进栈执行 2、在私有上下文中有一个存....

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更新时间 2024-07-03 22:03:38

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