Which equals operator (== vs ===) should be used in JavaScript ...
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 …
javascript - When should I use ?? (nullish coalescing) vs || (logical ...
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 …
What does ${} (dollar sign and curly braces) mean in a string in ...
2016年3月7日 · What does $ {} (dollar sign and curly braces) mean in a string in JavaScript? Asked 9 years, 6 months ago Modified 1 year, 9 months ago Viewed 421k times
Difference between == and === in JavaScript - Stack Overflow
2009年2月7日 · What is the difference between == and === in JavaScript? I have also seen != and !== operators. Are there more such operators?
javascript - Where should I put <script> tags in HTML markup?
When embedding JavaScript in an HTML document, where is the proper place to put the <script> tags and included JavaScript? I seem to recall that you are not supposed to place these in the …
Wait 5 seconds before executing next line - Stack Overflow
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...
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.
What is the correct way to check for string equality in JavaScript ...
2010年8月27日 · 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 …
How can I declare optional function parameters in JavaScript?
2012年10月9日 · Can I declare default parameter like function myFunc( a, b=0) { // b is my optional parameter } in JavaScript?
Usage of the backtick character (`) in JavaScript
2014年12月28日 · 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 …