Tags » javascript

TIL: console.log() holds a reference to an object, not a copy of it

When you view an array/object with console.log(), you see the contents at the time you expand it, not as it existed when you called console.log().

Localising the <time> with JavaScript

I’m using the <time> element and some JavaScript to display timestamps as human-readable, localised timestamps. Something like Tue, 15 Apr 2025 at 20:45 BST is easier to read than 2025-04-15T19:45:00Z.

TIL: Disable JavaScript in an <iframe> by setting the sandbox attribute

Making alt text more visible

I wrote a JavaScript snippet that shows alt text below all of my images, so I can see when it’s missing, and review it while I’m editing.

TIL: Sort a list of DOM elements by sorting and calling appendChild()

TIL: Use Unicode property escapes to detect emoji in JavaScript

Preserving Dates during JSON serialisation with vanilla JS

How to make sure you get a Date back when you call JSON.parse and JSON.stringify.

Testing JavaScript without a (third-party) framework

The browser can be a pretty good place to run your JavaScript tests.

CSS formatting in the console

Did you know you can use %c to format your console.log messages?

Getting an Important Internet Checkmark to follow your cursor

Party like it’s 1996! A trailing checkmark cursor will make your Brand Website feel fun and authentic.

Redacting sensitive query parameters with koa and koa-logger

Using a custom transporter to modify the log message and remove secret information.

A simple gallery plugin for Obsidian

Making it easier to find all the images in my Obsidian vault.

Finding redundant data in our Next.js props

A script that helps us optimise our __NEXT_DATA__, which in turn helps reduce page size.

An editing toolbar for alexwlchan.net

A bookmarklet that gives me a just-for-me toolbar to make changes to this site.

Remembering if a <details> element was opened

A JavaScript function that remembers if a details element was reopened, and keeps it open when you reload the page.

Showing human-friendly dates in JavaScript

What’s a nicer way to show a date than an ISO 8601 timestamp?

TIL: Manipulating URL query parameters in JavaScript

Adding checkboxes to lists

A bookmarklet to add checkboxes to lists in the browser.