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.
Which equals operator (== vs ===) should be used 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.
What does the !! (double exclamation mark) operator do in JavaScript ...
JavaScript allows upper- and lower-case letters (in a wide variety of scripts, not just English), numbers (but not at the first character), $, _, and others.ยน Prototype, jQuery, and most javascript libraries use the $ as the primary base object (or function).
What is the meaning of "$" sign in JavaScript - Stack Overflow
What does $ {} (dollar sign and curly braces) mean in a string in JavaScript? Asked 10 years, 1 month ago Modified 2 years, 4 months ago Viewed 431k times
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.
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:
javascript - When should I use ?? (nullish coalescing) vs || (logical ...