JavaScript

Insert an Item at a Specific Index in Array
https://pupli.net/2017/05/29/insert-an-item-at-a-specific-index-in-array-with-javascript/

Best practice for Polling in JavaScript using setTimeout
https://pupli.net/2019/06/12/best-practice-for-polling-in-javascript-using-settimeout/

Write Media Queries with JavaScript Code
https://pupli.net/2019/06/27/write-media-queries-with-javascript-code/

Check if an image is loaded in javascript
https://pupli.net/2019/06/27/check-if-an-image-is-loaded-in-javascript/

Detect when an image fails to load in Javascript
https://pupli.net/2019/07/01/detect-when-an-image-fails-to-load-in-javascript/