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- javascript - When should I use ?? (nullish coalescing) vs || (logical . . .
Related to Is there a "null coalescing" operator in JavaScript? - JavaScript now has a ?? operator which I see in use more frequently Previously most JavaScript code used || let userAge =
- 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
- 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
- How does the double exclamation (!!) work in JavaScript?
How does the double exclamation (!!) work in JavaScript? [duplicate] Asked 10 years, 8 months ago Modified 1 year, 9 months ago Viewed 254k times
- How to use OR condition in a JavaScript IF statement?
How to use OR condition in a JavaScript IF statement? Asked 15 years, 9 months ago Modified 2 years, 10 months ago Viewed 879k times
- 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
- 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 The primitive types boolean, string and number can be wrapped by their object counterparts These objects are instances of the Boolean, String and Number constructors respectively
- What is the correct way to check for string equality in JavaScript . . .
In all other cases, you're safe to use == Not only is it safe, but in many cases it simplifies your code in a way that improves readability I still recommend Crockford's talk for developers who don't want to invest the time to really understand Javascript—it's good advice for a developer who only occasionally works in Javascript
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