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  1. When should I use ?? (nullish coalescing) vs || (logical OR)?

    Related to Is there a "null coalescing" operator in JavaScript? - JavaScript now has a ?? operator which I see in use more frequently. Previously most JavaScript code used ||. let …

  2. syntax - What's the meaning of "=>" (a fat arrow formed from ...

    2017年6月20日 · 1 JavaScript arrow functions are roughly the equivalent of lambda functions in python or blocks in Ruby. These are anonymous functions with their own special syntax and …

  3. 学习JavaScript,有哪些好的博客或者网站推荐? - 知乎

    2017年5月9日 · 首先增加一个重要的内容: JavaScript | MDN 为什么首先推荐它呢? 曾任Mozilla公司首席首席技术官的Brendan Eich是JavaScript主要创造者与架构师。 这个是 Mozilla …

  4. What does the !! (double exclamation mark) operator do in ...

    Novice JavaScript developers need to know that the "not not" operator is using implicitly the original loose comparison method instead of the exact === or !== operators and also the …

  5. Allow JavaScript in your browser - Google AdSense Help

    Browser upgrades, security software, or patches may change a JavaScript setting. If you have problems viewing Google ads, you should confirm that JavaScript is allowed in your browser.

  6. JavaScript OR (||) variable assignment explanation

    That is, JavaScript "short-circuits" the evaluation of Boolean operators and will return the value associated with either the first non-false variable value or whatever the last variable contains. …

  7. Which equals operator (== vs ===) should be used in ...

    2008年12月11日 · I'm using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like …

  8. What is the difference between != and !== operators in ...

    2009年12月11日 · 30 What is the difference between the !== operator and the != operator in JavaScript? Does it behave similarly to the === operator where it compares both value and type?

  9. How do you use the ? : (conditional) operator in JavaScript?

    2011年6月7日 · 27 It's a little hard to google when all you have are symbols ;) The terms to use are "JavaScript conditional operator". If you see any more funny symbols in JavaScript, you …

  10. What's the difference between = and == in JavaScript?

    2019年6月24日 · What's the difference between = and == in JavaScript? [duplicate] Asked 13 years, 4 months ago Modified 5 months ago Viewed 21k times