JavaScript原型链作用域的相关内容

文章 2023-06-15 来自：开发者社区

web前端面试高频考点——JavaScript 篇（一）【JS的三座大山】原型和原型链、作用域和闭包、异步

JS 值类型和引用类型的区别值类型 let a = 100 let b = a a = 200 console.log(b) // 100 出处：https://coding.imooc.com/lesson/400.html#mid=30282引用类型 let a = {age: 20} let b = a b.age = 21 co...

文章 2022-02-16 来自：开发者社区

面试过程中javascript原型链与作用域的问题

现在校招也基本结束了,所以有时间把这段时间遇到的问题做个总结.在很多的笔试题目中,发现有很多对JS作用域方面的考察,所以查阅资料总结一下. 众所周知,js不像其他OOP语言那样,他是一种弱类型的语言,对数据类型没有很明显的区别.还有一点不同是它的作用域,引起这点不同主要是因为js的继承方式是通过原型链的方式来实现的. a)js没有块级作用域,所谓块级作用域即if,for,while(花括号括起.....

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更新时间 2024-07-01 09:27:11

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