Access wij-leren.nl. Wij-leren.nl - kennis over onderwijs en scholen

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

36/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value4.7 s

69/100

10%

TBT (Total Blocking Time)

Value1,890 ms

9/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.3 s

15/100

10%

wij-leren.nl

298 ms

wij-leren.nl

414 ms

gtm.js

84 ms

jquery-ui.css

33 ms

jquery-1.10.2.min.js

39 ms

Our browser made a total of 76 requests to load all elements on the main page. We found that 58% of them (44 requests) were addressed to the original Wij-leren.nl, 28% (21 requests) were made to Fonts.gstatic.com and 4% (3 requests) were made to Code.jquery.com. The less responsive or slowest element that took the longest time to load (899 ms) belongs to the original domain Wij-leren.nl.

Content Size

762.7 kB

After Optimization

719.9 kB

In fact, the total size of Wij-leren.nl main page is 762.7 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 55% of websites need less resources to load. Images take 437.1 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 24.2 kB

Original 31.3 kB
After minification 30.5 kB
After compression 7.2 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 24.2 kB or 77% of the original size.

Image Optimization

-4%

Potential reduce by 17.1 kB

Original 437.1 kB
After minification 420.0 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Wij Leren images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 199 B

Original 280.0 kB
After minification 279.9 kB
After compression 279.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-10%

Potential reduce by 1.4 kB

Original 14.3 kB
After minification 14.3 kB
After compression 12.9 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Wij-leren.nl has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Wij Leren. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

NL
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Wij-leren.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Wij-leren.nl main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

wij-leren.nl

Open Graph description is not detected on the main page of Wij Leren. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks:

Report Summary

Performance

Accessibility

Best Practices

SEO

Wij-leren.nl - kennis over onderwijs en scholen

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

wij-leren.nl

wij-leren.nl

gtm.js

jquery-ui.css

jquery-1.10.2.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

wij-leren.nl

wij-leren.nl

gtm.js

jquery-ui.css

jquery-1.10.2.min.js

jquery-ui.min.js

standaard.js

css

style.css

gpt.js

adsbygoogle.js

addthis_widget.js

dc.js

bg_algemeen.jpg

bg_header.jpg

twitter.png

linkedin.png

facebook.png

instagram.png

pinterest_sub.png

zoek.png

survey_home.png

wij-leren-onderwijs.jpg

survey_boeken.png

alle-leerlingen-bij-de-les-100.jpg

leren-in-een-levend-systeem-100.jpeg

survey_verdieping.png

de-beste-opstelling-100.jpg

doorgaande-leeslijn-van-groep-3-naar-groep-4-100.jpg

duurzaam-plan-leerlingen-ontmoeten-waar-ze-zijn-100.jpg

executieve-functies-ontwikkelen-in-de-klas-100.jpg

hallo-witte-scholen-100.jpg

het-ontwerpen-van-wetenschappelijk-onderzoek-CER-100.jpg

van-inclusief-leiderschap-naar-inclusief-meesterschap-102.jpg

klokkijken-met-een-verhaal-100-definitief.jpg

letterweken-begin-groep-4-100.jpg

onderwijs-als-ambacht-100.jpg

van-individueel-naar-inclusief-onderwijs-100.jpg

banner-wij-leren-medilex.gif

20-leermodules.jpg

boeken.png

dossiershome.png

footer_3.gif