JavaScript面试题闭包的相关内容

文章 2022-08-23 来自：开发者社区

JavaScript相关面试题:1.js垃圾回收机制；2.闭包；3.为什么不建议使用innerHTML；4.null和undefined的区别；5.new 操作符

文章目录JS 有哪些垃圾回收机制？说说你对闭包的理解为什么不建议在 JavaScript 中使用 innerHTML?null和undefined的区别是什么?new 操作符的作用是什么？JS 有哪些垃圾回收机制？:有以下垃圾回收机制。●标记清除(markandsweep)这是JavaScript 最常见的垃圾回收方式。当变量进入执行环境的时候，比如在函数中声明一个变量，垃圾回收器将其标记为“进....

文章 2022-08-23 来自：开发者社区

JavaScript相关面试题8:闭包

文章目录说说你对闭包的理解，以及闭包使用场景使用场景注意事项说说你对闭包的理解，以及闭包使用场景一个函数和对其周围状态（lexical environment，词法环境）的引用捆绑在一起（或者说函数被引用包围），这样的组合就是闭包（closure）也就是说，闭包让你可以在一个内层函数中访问到其外层函数的作用域在 JavaScript 中，每当创建一个函数，闭包就会在函数创建的同时被创建出来，作为....

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更新时间 2023-04-11 10:48:23

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