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- 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:
- Which equals operator (== vs ===) should be used in JavaScript . . .
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 idSele_UNVEHtype value
- 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?
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
- 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
- How to use OR condition in a JavaScript IF statement?
How to use OR condition in a JavaScript IF statement? Asked 15 years, 4 months ago Modified 2 years, 5 months ago Viewed 874k times
- What does ${} (dollar sign and curly braces) mean in a string in . . .
What does $ {} (dollar sign and curly braces) mean in a string in JavaScript? Asked 9 years, 4 months ago Modified 1 year, 7 months ago Viewed 418k times
- 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
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