JavaScript & Automatic Semicolon Insertion

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JavaScript & Automatic Semicolon Insertion

JavaScript & Automatic Semicolon Insertion ECMA 262 真香警告️ https://www.ecma-international.org/ecma-262/6.0/index.html#sec-automatic-semicolon-insertion Certain ECMAScript statements (empty statement, let, const, import, and export declarations, variab…

The Dangers of JavaScript’s Automatic Semicolon Insertion

Although JavaScript is very powerful, the language’s fundamentals do not have a very steep learning curve. Prior to the explosion of web applications, JavaScript was thought of as a toy language for amateur programmers. Some of JavaScript’s feature…

JavaScript Semicolon Insertion

JavaScript Semicolon Insertion https://blog.izs.me/2010/12/an-open-letter-to-javascript-leaders-regarding/ https://inimino.org/~inimino/blog/javascript_semicolons ESLint semi semi https://eslint.org/docs/rules/semi semi: ["error", "always&q…

auto semicolon insertion 自动分号补齐的坑

今天发现js自动分号补齐的坑,来看如下两段代码: function Hello(){ return { name: ’JavaScript’ }; } alert(Hello()); //输出undefined function Hello(){ return{ name: ’JavaScript’ }; } alert(Hello()); //输出 [object Object] 略看代码,差不多,但是输出却不一样.仔细看看第一段代码return后面多了个换行.我们平时写后端代码也经常有会这样…

JavaScript简易教程（转）

原文:http://www.cnblogs.com/yanhaijing/p/3685304.html 这是我所知道的最完整最简洁的JavaScript基础教程. 这篇文章带你尽快走进JavaScript的世界——前提是你有一些编程经验的话.本文试图描述这门语言的最小子集.我给这个子集起名叫做“JavaScript简易教程”,并推荐准备深入阅读细节和高级技巧之前的新手阅读.心急吃不了热豆腐.文章的最后提出如何进一步学习. 警告:下面是我所描述的规则集和最佳实践.我喜欢整洁清晰(例如,你可以随时通…

JavaScript简易教程

这是我所知道的最完整最简洁的JavaScript基础教程. 这篇文章带你尽快走进JavaScript的世界——前提是你有一些编程经验的话.本文试图描述这门语言的最小子集.我给这个子集起名叫做“JavaScript简易教程”,并推荐准备深入阅读细节和高级技巧之前的新手阅读.心急吃不了热豆腐.文章的最后提出如何进一步学习. 警告:下面是我所描述的规则集和最佳实践.我喜欢整洁清晰(例如,你可以随时通过下面的目录快速导航).规则是无懈可击的,但不可避免——每个人的理解不同. 目录 1. 本文约定 2.…

【转】Expressions versus statements in JavaScript

原文地址:http://www.2ality.com/2012/09/expressions-vs-statements.html Update 2012-09-21: New in Sect. 4: using void for IIFEs, concatenating IIFEs. This blog post looks at a syntactic distinction that is unfortunately quite important in JavaScript: the d…