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

    Dec 11, 2008 · 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 comparing …

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

    Jun 7, 2011 · JS is code that gets sent to the browser, so code length matters – TheRealMrCrowley. Commented May 11 ...

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

    I did see that description in that questions answer, but it's seemed like a repeat of well known JS boolean logic rather than a specific example. – mikemaccana Commented Apr 28, 2020 at 13:18

  4. What is the purpose of the dollar sign in JavaScript?

    Mar 29, 2022 · A '$' in a variable means nothing special to the interpreter, much like an underscore. From what I've seen, many people using jQuery (which is what your example …

  5. Usage of the backtick character (`) in JavaScript - Stack Overflow

    Dec 28, 2014 · It's a pretty useful functionality, for example here is a Node.js code snippet to test the set up of a 3 second timing function. const waitTime = 3000; console.log(`setting a …

  6. How to use OR condition in a JavaScript IF statement?

    Mar 2, 2010 · JS .some return not correct result-1. Adding an OR to if/else statements in Javascript-2. Jquery - If ...

  7. RegEx for matching "A-Z, a-z, 0-9, _" and "." - Stack Overflow

    May 14, 2019 · ^[A-Za-z0-9_.]+$ From beginning until the end of the string, match one or more of these characters. Edit: Note that ^ and $ match the beginning and the end of a line.

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

    It converts a nonboolean to an inverted boolean (for instance, !5 would be false, since 5 is a non-false value in JS), then boolean-inverts that so you get the original value as a boolean (so !!5 …

  9. javascript - POST Request with Fetch API? - Stack Overflow

    Sep 19, 2016 · Here is a complete example: After spending hours tinkering with incomplete code snippets I finally managed to post some json from javascript, pick it up using php on a server, …

  10. How can I hash a string with SHA256? - Stack Overflow

    Jan 17, 2020 · I'm looking to get a SHA256 hash in JavaScript, on Google Chrome 79.0.3945.130 (64-bit). I've been looking around thinking there would be some sort of official library or …

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