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everythingscience.co.za screenshot

Report Summary

  • 36

    Performance

    Renders faster than
    55% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

everythingscience.co.za

Practise Maths & Science - Read Open Textbooks | Siyavula

Page Load Speed

9 sec in total

First Response

1 sec

Resources Loaded

7.9 sec

Page Rendered

52 ms

everythingscience.co.za screenshot

About Website

Visit everythingscience.co.za now to see the best up-to-date Everything Science content for South Africa and also check out these interesting facts you probably never knew about everythingscience.co.za

Welcome to Siyavula! Read our textbooks for free or sign up to use our practice service and master maths and science

Visit everythingscience.co.za

Key Findings

We analyzed Everythingscience.co.za page load time and found that the first response time was 1 sec and then it took 7.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

everythingscience.co.za performance score

36

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value19.3 s

0/100

10%

LCP (Largest Contentful Paint)

Value27.3 s

0/100

25%

SI (Speed Index)

Value33.6 s

0/100

10%

TBT (Total Blocking Time)

Value380 ms

70/100

30%

CLS (Cumulative Layout Shift)

Value0.01

100/100

15%

TTI (Time to Interactive)

Value21.7 s

1/100

10%

Network Requests Diagram

everythingscience.co.za

1041 ms

everythingscience.co.za

1485 ms

www.siyavula.com

1584 ms

ionic.bundle.css

375 ms

cutty.min.css

748 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 5% of them (2 requests) were addressed to the original Everythingscience.co.za, 93% (40 requests) were made to Siyavula.com and 2% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (3.3 sec) relates to the external source Siyavula.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 67.4 kB (11%)

Content Size

617.4 kB

After Optimization

550.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Everythingscience.co.za main page is 617.4 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. 25% of websites need less resources to load. Javascripts take 394.0 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 29.4 kB

  • Original 38.9 kB
  • After minification 32.3 kB
  • After compression 9.5 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. This page needs HTML code to be minified as it can gain 6.5 kB, which is 17% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 29.4 kB or 76% of the original size.

Image Optimization

-18%

Potential reduce by 3.1 kB

  • Original 17.0 kB
  • After minification 13.9 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. Obviously, Everything Science needs image optimization as it can save up to 3.1 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-4%

Potential reduce by 15.2 kB

  • Original 394.0 kB
  • After minification 394.0 kB
  • After compression 378.7 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

-12%

Potential reduce by 19.7 kB

  • Original 167.6 kB
  • After minification 167.6 kB
  • After compression 147.9 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. Everythingscience.co.za needs all CSS files to be minified and compressed as it can save up to 19.7 kB or 12% of the original size.

Requests Breakdown

Number of requests can be reduced by 26 (76%)

Requests Now

34

After Optimization

8

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Everything Science. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

everythingscience.co.za

everythingscience.co.za

1041 ms

everythingscience.co.za

everythingscience.co.za

1485 ms

www.siyavula.com

www.siyavula.com

1584 ms

ionic.bundle.css

ionic.bundle.css

375 ms

cutty.min.css

cutty.min.css

748 ms

shared.min.css

shared.min.css

2216 ms

FrontView.min.css

FrontView.min.css

1494 ms

ionic.min.css

ionic.min.css

1116 ms

tailwind.min.css

tailwind.min.css

1138 ms

styles.min.css

styles.min.css

1141 ms

startup.min.js

startup.min.js

1132 ms

ionic.esm.js

ionic.esm.js

1489 ms

ionic.js

ionic.js

1888 ms

jquery.min.js

jquery.min.js

1881 ms

js

js

54 ms

lodash.min.js

lodash.min.js

1522 ms

moment.min.js

moment.min.js

2347 ms

jquery.blockUI.js

jquery.blockUI.js

1862 ms

bluebird.min.js

bluebird.min.js

1902 ms

jquery.fitvids.js

jquery.fitvids.js

2357 ms

velocity.min.js

velocity.min.js

2359 ms

react.production.min.js

react.production.min.js

2364 ms

react-dom.production.min.js

react-dom.production.min.js

2366 ms

redux.min.js

redux.min.js

2582 ms

redux-thunk.min.js

redux-thunk.min.js

2602 ms

react-redux.min.js

react-redux.min.js

2601 ms

frontend-components.min.js

frontend-components.min.js

3005 ms

main.min.js

main.min.js

2643 ms

cutty.min.js

cutty.min.js

2660 ms

FrontView.min.js

FrontView.min.js

3319 ms

register-service-worker.min.js

register-service-worker.min.js

2970 ms

logo-ffffff.svg

logo-ffffff.svg

672 ms

learner.svg

learner.svg

722 ms

teacher.svg

teacher.svg

731 ms

maths-10.jpg

maths-10.jpg

1044 ms

science-12.jpg

science-12.jpg

1052 ms

tbk-6.jpg

tbk-6.jpg

1079 ms

twitter.svg

twitter.svg

1096 ms

facebook.svg

facebook.svg

1105 ms

paygate-card-brand-logos-40.png

paygate-card-brand-logos-40.png

1384 ms

379 ms

381 ms

380 ms

Accessibility Review

everythingscience.co.za accessibility score

73

Accessibility Issues

Names and labels

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.

Impact

Issue

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

everythingscience.co.za best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

everythingscience.co.za SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Page is blocked from indexing

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

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/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Everythingscience.co.za can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Everythingscience.co.za 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

everythingscience.co.za

Open Graph description is not detected on the main page of Everything Science. 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: