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 false, it will not use the right-hand side:
What does the !! (double exclamation mark) operator do in JavaScript . . . 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 hidden cast operation that is happening behind the scenes and I show it in the example I provide
How do you use the ? : (conditional) operator in JavaScript? 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 should try looking up JavaScript's operators first: Mozilla Developer Center's list of operators The one exception you're likely to encounter is the $ symbol
JavaScript comparison operators: Identity vs. Equality I've been trying to understand the difference between JavaScript's comparison operators: identity and equality From what I've read, if you check the equality of two objects using ==, JavaScript wi
What is the purpose of the dollar sign in JavaScript? Javascript does have types; and in any case, how is the dollar sign even related to that? It's just a character that happens to be a legal identifier in Javascript
Is there a null coalescing operator in JavaScript? 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 its left-hand-side operand