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 …

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 …

2008年12月11日 · 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 …

2009年12月11日 · What is the difference between the !== operator and the != operator in JavaScript? Does it behave similarly to the === operator where it compares both value and type?

2011年6月7日 · 27 It's a little hard to google when all you have are symbols ;) The terms to use are "JavaScript conditional operator". If you see any more funny symbols in JavaScript, you …

2022年3月29日 · 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.

2010年3月2日 · How to use OR condition in a JavaScript IF statement? Asked 15 years, 10 months ago Modified 2 years, 11 months ago Viewed 880k times

I quite often see JavaScript with variables that start with a dollar sign. When/why would you choose to prefix a variable in this way? (I'm not asking about $('p.foo') syntax that you see in …

2015年3月28日 · How does the double exclamation (!!) work in JavaScript? [duplicate] Asked 10 years, 9 months ago Modified 1 year, 11 months ago Viewed 255k times

2009年4月22日 · The biggest misconception in many of the answers here is that 'undefined' is a Javascript keyword. It's not a keyword at all, but a variable that (most of the time) happens to …