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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 gotchas of CSS Nesting

The gotchas of CSS Nesting

Comments
3 min read

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:root isn't global

:root isn't global

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2 min read
A small JavaScript pattern I enjoy using

A small JavaScript pattern I enjoy using

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2 min read
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

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

The EyeDropper API: Pick colors from anywhere on your screen

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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

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8 min read
Detecting media query support in CSS and JavaScript

Detecting media query support in CSS and JavaScript

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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

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5 min read
How hexadecimal notation works for CSS colors

How hexadecimal notation works for CSS colors

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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

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3 min read
Debug your visual hierarchy with the squint test

Debug your visual hierarchy with the squint test

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4 min read
CSS breakpoints used by popular CSS frameworks

CSS breakpoints used by popular CSS frameworks

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4 min read
The complete guide to CSS media queries

The complete guide to CSS media queries

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1 min read
Creating files in JavaScript in your browser

Creating files in JavaScript in your browser

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3 min read
Accessibility is not like drowning

Accessibility is not like drowning

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3 min read
For many, accessibility is an unknown unknown

For many, accessibility is an unknown unknown

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4 min read
Your dark mode toggle is broken

Your dark mode toggle is broken

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

8 ways to increase your productivity as a web developer

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8 min read
New online tools: CSS specificity calculator and color contrast checker

New online tools: CSS specificity calculator and color contrast checker

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2 min read
I built my own browser

I built my own browser

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5 min read
4 CSS layouts without using media queries

4 CSS layouts without using media queries

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6 min read
Using easing for more than just CSS transitions

Using easing for more than just CSS transitions

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4 min read
The box model is not layout

The box model is not layout

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4 min read
The perfect responsive menu

The perfect responsive menu

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3 min read
Writing CSS in Dutch using PostCSS

Writing CSS in Dutch using PostCSS

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1 min read
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