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  1. 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 …

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

    Jun 7, 2011 · The conditional (ternary) operator is the only JavaScript operator that takes three operands. This operator is frequently used as a shortcut for the if statement.

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

    The nullish coalescing operator (??) in JavaScript only considers null or undefined as "nullish" values. If the left-hand side is any other value, even falsy values like "" (empty string), 0, or …

  4. 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 …

  5. JavaScript OR (||) variable assignment explanation - Stack Overflow

    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. …

  6. Is there a "null coalescing" operator in JavaScript?

    Jan 25, 2009 · JavaScript now supports the nullish coalescing operator (??). It returns its right-hand-side operand when its left-hand-side operand is null or undefined, and otherwise returns …

  7. Newest 'javascript' Questions - Stack Overflow

    JavaScript (a dialect of ECMAScript) is a high-level, multi-paradigm, object-oriented, prototype-based, dynamically-typed, and interpreted language traditionally used for client-side scripting …

  8. Which "href" value should I use for JavaScript links, "#" or ...

    Sep 26, 2008 · The following are two methods of building a link that has the sole purpose of running JavaScript code. Which is better, in terms of functionality, page load speed, validation …

  9. How can I use modulo operator (%) in JavaScript? [duplicate]

    How can I use modulo operator (%) in calculation of numbers for JavaScript projects?

  10. What does "javascript:void (0)" mean? - Stack Overflow

    Aug 18, 2009 · Usage of javascript:void(0) means that the author of the HTML is misusing the anchor element in place of the button element. Anchor tags are often abused with the onclick …