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Kilian Valkhof profile picture

Kilian Valkhof

Building https://polypane.app to help every developer and designer build better websites, faster.

Location The Netherlands Joined Joined on  Personal website https://kilianvalkhof.com github website twitter website

Work

User experience developer at Polypane

The breakpoints we tested in 2021, and the ones to test in 2022

The breakpoints we tested in 2021, and the ones to test in 2022

Reactions 7 Comments
5 min read
The EyeDropper API: Pick colors from anywhere on your screen

The EyeDropper API: Pick colors from anywhere on your screen

Reactions 10 Comments
5 min read
Polypane 6.2: HTML validation, robots.txt support, RTL emulation and more

Polypane 6.2: HTML validation, robots.txt support, RTL emulation and more

Reactions 2 Comments
8 min read
Detecting media query support in CSS and JavaScript

Detecting media query support in CSS and JavaScript

Reactions 6 Comments
4 min read
Polypane 6.1: Readability, Content Chaos and rewritten event sync engine

Polypane 6.1: Readability, Content Chaos and rewritten event sync engine

Reactions 13 Comments 1
5 min read
How hexadecimal notation works for CSS colors

How hexadecimal notation works for CSS colors

Reactions 8 Comments
2 min read
Includes, contains or has. Finding things in iterables (lists) in JavaScript

Includes, contains or has. Finding things in iterables (lists) in JavaScript

Comments
3 min read
Debug your visual hierarchy with the squint test

Debug your visual hierarchy with the squint test

Reactions 8 Comments
4 min read
CSS breakpoints used by popular CSS frameworks

CSS breakpoints used by popular CSS frameworks

Reactions 14 Comments 1
4 min read
The complete guide to CSS media queries

The complete guide to CSS media queries

Reactions 61 Comments 2
1 min read
Creating files in JavaScript in your browser

Creating files in JavaScript in your browser

Reactions 7 Comments
3 min read
Accessibility is not like drowning

Accessibility is not like drowning

Reactions 12 Comments 1
3 min read
For many, accessibility is an unknown unknown

For many, accessibility is an unknown unknown

Reactions 19 Comments 1
4 min read
Your dark mode toggle is broken

Your dark mode toggle is broken

Reactions 4 Comments
3 min read
8 ways to increase your productivity as a web developer

8 ways to increase your productivity as a web developer

Reactions 147 Comments 1
8 min read
New online tools: CSS specificity calculator and color contrast checker

New online tools: CSS specificity calculator and color contrast checker

Reactions 9 Comments
2 min read
I built my own browser

I built my own browser

Reactions 11 Comments 3
5 min read
4 CSS layouts without using media queries

4 CSS layouts without using media queries

Reactions 9 Comments
6 min read
Using easing for more than just CSS transitions

Using easing for more than just CSS transitions

Reactions 34 Comments
4 min read
The box model is not layout

The box model is not layout

Reactions 4 Comments
4 min read
The perfect responsive menu

The perfect responsive menu

Reactions 62 Comments 5
3 min read
Writing CSS in Dutch using PostCSS

Writing CSS in Dutch using PostCSS

Reactions 5 Comments 3
1 min read
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