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 ...
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 =
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
How do you use the ? : (conditional) operator in JavaScript?
2011年6月7日 · 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 …
Javascript, viewing [object HTMLInputElement] - Stack Overflow
2013年3月13日 · I'm just started to learn HTML. Doing an alert() on one of my variables gives me this result [object HTMLInputElement]. How to get the data, that were added in text field, …
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 …
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 …
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 …
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...