JavaScript

Fisher-Yates Algorithm Most of the answers on StackOverflow on how to shuffle an array are not truly random. I wanted to repost this, so we never lose it. Using this algorithm from 1938 we can shuffle an array with more true randomness than other options out there. JavaScript implementation Here’s the JavaScript version of the […]

I was trying to do a querySelector by text, trying to find elements with certain text content of an element. It turns out you can do that with XPath without much effort. With any XPath expression you can think of. Query the elements In my particular use caes, the HTML looks like this: Use your […]

If you want to access the location.search parameters with JavaScript and have a key / value object returned, here’s a snippet for you: How to use it Output Jest Unit Tests I even have some unit tests for you, using Jest

Here’s how to order an array of objects by multiple property values. I want to order my friends: First the oldest. If they have the same age, first the tallest. We’ll use Array.prototype.sort() Result As you can see the friend 4 and 5, who have the same age have been sorted by tallest first.

If you’re debugging a LocalStorage issue and want to use a call stack to know what or who is triggering a localstorage get or set you can define a proxy function. The following snippet will overwrite the window.localStorage It has the same functions but adds a console.log and debugger before them.

How to to filter an array using another array with JavaScript…

Delete browser cookies from JavaScript…