Dec 11, 2008 · 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 …

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 …

With optimisation of the JavaScript engine in browsers, the performance for operators and functions change. With current browsers, using ~~ instead of Math.floor is somewhat faster in …

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 =

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 …

193 In Java, you can use instanceOf or getClass() on a variable to find out its type. How do I find out a variable's type in JavaScript which isn't strongly-typed? For example, how do I know if …

This function below doesn’t work like I want it to; being a JS novice I can’t figure out why. I need it to wait 5 seconds before checking whether the newState is -1. Currently, it doesn’t wait, i...

How can I check for null values in JavaScript? I wrote the code below but it didn't work.

How do I format a Javascript Date object as a string? (Preferable format: 10-Aug-2010)

Here is the explanation JavaScript window.location object can be used to get current page address (URL) to redirect the browser to another page to reload the same page window: in …