JavaScript

Topic	Replies	Views	Activity
Remove duplication to improve code tutorial In a recent thread about validating form fields, I noticed a lot of duplication in the code, and that duplication has been making it tricky for people to examine the code. This thread is dedicated to exploring how to eff…	49	13412	August 4, 2021
Converting jQuery to vanilla JavaScript, a step by step guide Frequently I see on here people asking to deal with jQuery, for example with converting it to vanilla JavaScript. As a result I thought that I’d provide a worked example of converting code from jQuery to vanilla JavaScr…	14	15301	July 16, 2020
An introduction to debugging code Recently while helping someone make improvements to an SVG shape editor being developed on JSFiddle, we were setting the currently active shape with a thicker stroke. That worked when one of the Stroke input fields was a…	2	14529	April 26, 2018
How is this done?	4	95	January 12, 2026
How to execute GTM messaging in the case of shopping cart?	3	86	December 20, 2025
How to optimize the speed of this website: PageSpeed Insights shows it is too slow scripts , ecommerce , wordpress , woocommerce	2	83	January 6, 2026
Telephone RegExp	6	88	December 27, 2025
Could someone please help check my url string to page output code is safe?	19	191	November 30, 2025
Permission issue when accessing page content in a Firefox extension scripts	4	101	November 28, 2025
What’s the best language to focus on in 2025 — TypeScript or JavaScript? javascript , typescript	17	343	December 4, 2025
Need to access all but current button in a grid array of buttons scripts	29	402	October 29, 2025
TinyMCE 8 with Line Number Language and Copy Button	4	117	October 16, 2025
Where to Begin	51	666	October 17, 2025
A javascript graph function works on wamp server but won't work on hosting server	3	112	October 8, 2025
How to whitelist wildcard subdomains for Google reCAPTCHA v3 in a multi-tenant app? security	1	111	October 6, 2025
D3.js zoom translateExtent not returning to 0 graphics	1	113	October 24, 2025
Unable to click onto form elements in modal javascript , bootstrap , css , react	2	94	October 4, 2025
How exactly is the mouseover page preview on Wikipedia done?	3	129	October 4, 2025
Npm run dev	9	111	October 4, 2025
Check if file exists javascript	8	150	October 1, 2025
Where Does JavaScript Run	6	175	September 19, 2025
Submit a form with react	2	190	September 3, 2025
Selecting sub-menu items	14	305	August 29, 2025
I want to know Best Way to Manage Component State Without Going Overboard?	2	292	August 8, 2025
Cropper js - Cropper grid issue - Help please!	9	663	August 8, 2025
Cache Plugin Causes Click Issue After Activation	4	159	August 3, 2025
How do I fix “undefined” or “null” errors in JavaScript?	2	74	August 1, 2025
Have you ever chosen Node.js over PHP, and if so, why? php , nodejs	16	574	July 25, 2025
Learning react	6	380	July 24, 2025
Changing value inside text field based on body class>?	10	415	July 18, 2025

Remove duplication to improve code

tutorial

In a recent thread about validating form fields, I noticed a lot of duplication in the code, and that duplication has been making it tricky for people to examine the code. This thread is dedicated to exploring how to eff…

49

13412

August 4, 2021

Converting jQuery to vanilla JavaScript, a step by step guide

Frequently I see on here people asking to deal with jQuery, for example with converting it to vanilla JavaScript. As a result I thought that I’d provide a worked example of converting code from jQuery to vanilla JavaScr…

14

15301

July 16, 2020

An introduction to debugging code

Recently while helping someone make improvements to an SVG shape editor being developed on JSFiddle, we were setting the currently active shape with a thicker stroke. That worked when one of the Stroke input fields was a…

2

14529

April 26, 2018

How is this done?