Digital accessibility week in the Netherlands
This isn't sexy at all, but someone has to do it as your customers (or maybe even your very own relatives) could be subject to this temporary or even permanently.
Pagespeed findings
Can't get enough? I'm regularly sharing snack bite tips and advice on LinkedIn as well.
Cloudflare Rocket Loader and Core Web Vitals
Render blocking JS? Use Cloudflare Rocket Loader JS they said! But then Core Web Vitals came around, changing things 😕 However, Cloudflare Rocket Loader already came with a handful of pitfalls:
GTmetrix pagespeed: outdated and going to use Core Web Vitals
Earlier I wrote why to use PageSpeed Insights instead of GTmetrix, but this might not be accurate anymore by the end of the month. GTmetrix announced they will be moving to using Core Web Vitals as well.
Webflow pagspeed and Core Web Vitals
Webflow was founded in 2012 and is an online visual editor platform allowing users to design, build and launch websites. Does this mean you can't get high PageSpeed scores? And what about the newest Core Web Vitals?
Best free website Performance + CrUX toolings in 2020
If you want to check the performance of your webshop or website, these are the best free toolings you can use.
Why you should use PageSpeed Insights, instead of GTmetrix or Pingdom
The answer to one of my most asked questions (spoiler alert: it's because of SEO and UX).
Why isn't HTTP/2 improving the pagespeed score
Sometimes a LinkedIn post of mine is leading to new questions as well. This time: "How do you get a high PageSpeed score when a site is using HTTP/2?"
Accessible Wordpress themes for WCAG 2.1 websites
Some (WP) agencies are really into accessibility. However, when you do support accessibility as a developer, but not really pay close attention, there is a big chance you are unknowingly building inaccessible Wordpress websites for your clients.
7 steps for building web accessible hamburger menu's
Accessibility is like privacy: it often isn't the core business of a company. Even menu's become the victim. As a result, some might never be able to reach or interact with your main navigation.
WCAG 2.1 translated by Accessibility Foundation
Being a recommendation since June 5th, 2018, the Web Content Accessibility Guidelines 2.1 got translated to Dutch and published by Accessibility Foundation.
Does 5G make my sitespeed issues go away?
Recently, when discussing pagespeed optimizations within a platform migration, I was asked if fiber internet or 5G will make sitespeed issues go away, or just making it worse.
How faster internet resulted in slower sites and webshops
During the years 2011 through 2019, 4g coverage spread from 5% to 79% of the world. During that same time period, the median average JavaScript transfer size to mobile devices increased by 611%, from 52kb to 372.9 KB.
6 free website pagespeed & performance improvements
While there are a lot of articles to be found on the subject of pagespeed or improving overall sitespeed, most will come out-of-the-box.
Why using a library instead of native lazyloading
To lazyload or not to lazyload images? From a user and performance perspective, you should lazyload images, but should you use a JS library?
Native image lazyloading support
Browsers are always trying to optimize as well. Some browsers already support lazyloading of images and iframes, using the loading attribute.
Preloading with care
Resource hints or preloading is hot, I see it more and more in an attempt to (allegedly) improve website/shop performance, by preloading some assets.
Fast, accessible and data-saving websites
Although most of my work is pagespeed-related, I also like to address web accessibility and carbon emission when doing R&D for our website-producing CMS.
Encrypting DNS query bad for performance?
DNS over HTTPS, Mozilla and Chrome already started experimenting with this a while back, to encrypt the last part of web traffic that isn't secure yet by default. But what really is the impact on privacy, security, as well as performance?
Slides of Tweakers frontend performance talk
Last Thursday, I spoke at the sold out Tweakers Developers Summit. I talked about performance with a bit of conversion/UX/SEO/AMP and PWA.
Web push notifications and acceptance rate
Have websites been misusing push notifications? Website owners started to abuse push notifications with user complaints as a result. The idea was great, but now Google itself is stopping it.