Kilian Valkhof

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

The Netherlands Joined on Jun 26, 2019 https://kilianvalkhof.com

Work

User experience developer at Polypane

Polypane

UX, UI, Javascript

https://polypane.app a web browser for front-end developers and designers

https://superposition.design extract design tokens from websites and use them in code and design tools.

https://fromscratch.rocks an autosaving super simple note taking app

Electron-based applications, Prototypes and MVP's

25 posts published

27 comments written

7 tags followed

Kilian Valkhof

Jun 13 '23

The gotchas of CSS Nesting

#css #webdev #tutorial

3 min read

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Kilian Valkhof

May 3 '23

:root isn't global

#css #webdev

2 min read

Kilian Valkhof

Apr 6 '23

A small JavaScript pattern I enjoy using

#javascript #functional #webdev #programming

2 min read

Kilian Valkhof for Polypane

Jan 19 '22

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

#webdev #css #ux #beginners

5 min read

Kilian Valkhof for Polypane

Nov 11 '21

The EyeDropper API: Pick colors from anywhere on your screen

#javascript #webdev #ux

5 min read

Kilian Valkhof for Polypane

Jul 26 '21

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

#showdev #css #javascript #webdev

8 min read

Kilian Valkhof

Jul 13 '21

Detecting media query support in CSS and JavaScript

#css #javascript

4 min read

Kilian Valkhof for Polypane

Jun 1 '21

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

#webdev #css #javascript #design

5 min read

Kilian Valkhof

Apr 8 '21

How hexadecimal notation works for CSS colors

#css #design #webdev

2 min read

Kilian Valkhof

Jan 29 '21

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

#javascript

3 min read

Kilian Valkhof for Polypane

Dec 11 '20

Debug your visual hierarchy with the squint test

#a11y #design #ux #css

4 min read

Kilian Valkhof for Polypane

Aug 6 '20

CSS breakpoints used by popular CSS frameworks

#css #webdev #design

4 min read

Kilian Valkhof for Polypane

Jul 22 '20

The complete guide to CSS media queries

#css #design #webdev

1 min read

Kilian Valkhof for Polypane

May 28 '20

Creating files in JavaScript in your browser

#javascript #ux

3 min read

Kilian Valkhof

May 21 '20

Accessibility is not like drowning

#a11y

3 min read

Kilian Valkhof for Polypane

May 19 '20

For many, accessibility is an unknown unknown

#a11y #ux #webdev #design

4 min read

Kilian Valkhof for Polypane

May 4 '20

Your dark mode toggle is broken

#css #design #webdev #ux

3 min read

Kilian Valkhof for Polypane

Apr 29 '20

8 ways to increase your productivity as a web developer

#productivity #webdev #css

147

8 min read

Kilian Valkhof for Polypane

Apr 14 '20

New online tools: CSS specificity calculator and color contrast checker

#a11y #design #css #webdev

2 min read

Kilian Valkhof for Polypane

Feb 13 '20

I built my own browser

#showdev #webdev

5 min read

Kilian Valkhof for Polypane

Jan 29 '20

4 CSS layouts without using media queries

#css #design #html #webdev

6 min read

Kilian Valkhof for Polypane

Jan 8 '20

Using easing for more than just CSS transitions

#css #animation #design

4 min read

Kilian Valkhof for Polypane

Oct 14 '19

The box model is not layout

#css #design #layout

4 min read

Kilian Valkhof for Polypane

Oct 7 '19

The perfect responsive menu

#webdev #responsive #css #javascript

3 min read

Kilian Valkhof for Polypane

Jun 28 '19

Writing CSS in Dutch using PostCSS

#css #design #webdev #beginners

1 min read

Polypane

Writing Debut

Four Year Club

1 Week Community Wellness Streak

Three Year Club

Two Year Club

One Year Club

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