What does the !! (double exclamation mark) operator do in …
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 …
JavaScript comparison operators: Identity vs. Equality
Aug 9, 2016 · 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 …
What does ${} (dollar sign and curly braces) mean in a string in ...
Mar 7, 2016 · What does $ {} (dollar sign and curly braces) mean in a string in JavaScript? Asked 9 years, 7 months ago Modified 1 year, 10 months ago Viewed 422k times
Is there a "null coalescing" operator in JavaScript?
Jan 25, 2009 · 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 …
How do you use the ? : (conditional) operator in JavaScript?
Jun 7, 2011 · If javascript only has 1 of a type of operator, then it is definitely correct to say THE ternary operator and not A ternary operator... Saying "this ternary operator is A ternary …
What's the difference between & and && in JavaScript?
What's the difference between & and && in JavaScript? Asked 14 years, 1 month ago Modified 1 year, 6 months ago Viewed 143k times
Why would a JavaScript variable start with a dollar sign?
A valid JavaScript identifier shuold must start with a letter, underscore (_), or dollar sign ($); subsequent characters can also be digits (0-9). Because JavaScript is case sensitive, letters …
JavaScript OR (||) variable assignment explanation
That is, JavaScript "short-circuits" the evaluation of Boolean operators and will return the value associated with either the first non-false variable value or whatever the last variable contains. …
Usage of the backtick character (`) in JavaScript
Dec 28, 2014 · 4 The backtick character (`) in JavaScript is used to define template literals. A template literal is a special type of string that allows you to embed expressions, which are …
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 …