computer science

HTML5test

HTML5test is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand HTML5test rather than just read about it. In short: HTML5test.com is a discontinued web app for evaluating a web browser's implementation some of common web standards, including HTML5, Web SQL Database, Scalable Vector Graphics (SVG), and WebGL. The test suite was developed by Dutch web programmer Niels Leenheer and published in March 2010.

Key takeaways

HTML5test belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect HTML5test to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of HTML5test from memory before moving on to harder problems.

Reference excerpt

HTML5test.com is a discontinued web app for evaluating a web browser's implementation some of common web standards, including HTML5, Web SQL Database, Scalable Vector Graphics (SVG), and WebGL. The test suite was developed by Dutch web programmer Niels Leenheer and published in March 2010. The app returns an integer score out of a possible 555 points. The point total has changed multiple times over the software's evolution. Leenheer introduced the present scoring system as part of a major redesign of the test introduced in November 2013. On 9 January 2024, Leenheer announced a problem with the app's server and added that he has no incentives to work on it anymore. Since then third-party derivations have been set up at html5test.co and html5test.opensuse.org. HTML5Test.com evaluates the browser's support for Web storage, the W3C Geolocation API, HTML5-specific HTML elements (including the canvas element), and other features. It does not evaluate a browser's conformance to other web standards, such as Cascading Style Sheets, ECMAScript, or the Document Object Model. Conformance testing for those standards is within the purview of Acid3, an automated test published by Ian Hickson in 2008. Similarly, Acid3 does not evaluate a browser's HTML5 conformance. The test scope of HTML5Test.com and that of Acid3 are mutually exclusive.

Illustrations

Worked examples

Example 1 — a first encounter with HTML5test

Start with the simplest possible case. Write down what HTML5test claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to HTML5test before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about HTML5test ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of HTML5test

In research: HTML5test appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses HTML5test in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: HTML5test is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computing websites, Dutch websites, HTML5, so understanding it makes those chapters shorter.
In everyday life: Look for HTML5test outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study HTML5test in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what HTML5test means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain HTML5test out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HTML5test in simple terms?

Why does HTML5test matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study HTML5test?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on HTML5test.