JavaScript高级程序设计作用域的相关内容

文章 2022-12-07 来自：开发者社区

《JavaScript高级程序设计》__ 作用域&内存

前言大家好，我是HoMeTown，web领域有一本神书大家应该都有看过，这本书我看过两遍，但是每次看都是粗粗的略过一些重要的知识点，甚至一些面试过程中的问题，在这本书里都能找到答案。工作这么多年，到现在为止对这本书都没有一个系统的知识点记录，这次想从头读一遍这一本JavaScript高级程序设计【第4版】，并把重要的知识点记录下来，同时加上自己的见解，这也是我第一次在掘金上记录分享读书笔记，共勉....

文章 2018-07-10 来自：开发者社区

《JavaScript 高级程序设计》第四章：变量、作用域和内存问题

目录变量的引用执行环境及作用域作用域链延长块级作用域垃圾回收机制变量的引用当一个变量保存了基本数据类型时，此时对于变量的操作（赋值，运算）就是操作这个基本数据的本身，就算是赋值操作，赋值时拷贝后的值与之前的值也是相互独立互不影响的。 var a = 1; var b = a b++; console.log(a); //1 console.log(b); //2复制代码复制代...

文章 2017-11-22 来自：开发者社区

Javascript高级程序设计第二版第四章--变量，作用域及内存问题--笔记

由于JavaScript 变量松散类型的本质，决定了它是在特定时间用于保存特定值的一个名字而已，变量的值及其数据类型可以在脚本的生命周期内改变。这可能既有趣又强大，同时又容易出问题。 4.1 语法 ECMAScript 变量包括两种类型： a) 基本类型值保存在...

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