About 18,700,000 results
Open links in new tab
  1. Which equals operator (== vs ===) should be used in JavaScript ...

    Dec 11, 2008 · JavaScript has two sets of equality operators: === and !==, and their evil twins == and !=. The good ones work the way you would expect. The good ones work the way you …

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

    Jun 7, 2011 · 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 should …

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

    A third use is to produce logical XOR and logical XNOR. In both C and JavaScript, a && b performs a logical AND (true if both sides are true), and a & b performs a bitwise AND. a || b …

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

    Mar 29, 2022 · Unlike many similar languages, identifiers (such as functional and variable names) in Javascript can contain not only letters, numbers and underscores, but can also contain …

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

    Mar 2, 2010 · In JavaScript, if you're looking for A or B, but not both, you'll need to do something similar to:

  6. What's the difference between & and && in JavaScript?

    This operator is almost never used in JavaScript. Other programming languages (like C and Java) use it for performance reasons or to work with binary data. In JavaScript, it has questionable …

  7. What does ${} (dollar sign and curly braces) mean in a string in ...

    Mar 7, 2016 · I haven't seen anything here or on MDN. I'm sure I'm just missing something. There's got to be some documentation on this somewhere.

  8. Usage of the backtick character (`) in JavaScript

    Dec 28, 2014 · Backticks in JavaScript is a feature which is introduced in ECMAScript 6 // ECMAScript 2015 for making easy dynamic strings. This ECMAScript 6 feature is also named …

  9. javascript - What does [object Object] mean? - Stack Overflow

    In JavaScript there are 7 primitive types: undefined, null, boolean, string, number, bigint and symbol. Everything else is an object. Everything else is an object. The primitive types boolean …

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

    Aug 18, 2009 · In addition to the technical answer, javascript:void means the author is Doing It Wrong. There is no good reason to use a javascript: pseudo-URL(*). In practice it will cause …

Refresh