本文汇总了前端面试中常见的基础、中级和高级问题，包括DOCTYPE的作用、null与undefined的区别、懒加载概念、JavaScript中的强制类型转换、元标签用法、IIFE、回调函数、React.js介绍、外部JS和CSS的使用优势、this关键字的含义，以及类与ID属性差异、CSS精灵图、解决浏览器特定样式问题的策略、W3C的职责和display:none与visibility:hidden的区别等。这些问题旨在帮助你为前端面试做好准备。
Frontend development covers a wide range of tools, which could make its interview hard. So here we have provided some frequently asked front-end interview questions. The only purpose of these front-end interview questions is to give you an idea about what kind of questions you can expect during your interview. So, let’s start!
Front End Interview Questions and Answers blog is widely categorized into the following three types:
- Basic
- Intermediate
- Advanced
Basic Front End Interview Questions
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What does DOCTYPE stand for, and what does it do?
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What is the difference between null and undefined?
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What is Lazy Loading?
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What is Coercion in JS?
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What is the use of meta tags in HTML documents?
Intermediate Front End Interview Questions
- What is IIFE?
7.. What are the callback functions in JS?
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What is React.js?
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Why it is encouraged to use external JS and CSS over in-line?
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What does this keyword do in JS?
Advanced Front End Interview Questions
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What is the difference between class and id attributes?
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What are CSS image sprites and why it is used?
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Give some suggestions on how could we fix the browser-specific styling issue?
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What does W3C do?
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What is the key difference between visibility: hidden and display: none?
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