w3c Examples and Free Source Code

HGROUP element removed from the HTML5 Specification. What alternative technique can be used instead?...

html w3c semantic-markup web-standards

Hex representation of a color with alpha channel?...

colors standards w3c

How to make youtube embed code HTML valid for w3c validator?...

html youtube w3c w3c-validation

What is the most semantic way to display a street address in HTML?...

html w3c semantic-markup street-address

Is quoting the value of url() really necessary?...

css w3c

Do modern browsers care about the DOCTYPE?...

html doctype w3c

How does web application restore original URL after HTTP proxy or load balancer?...

http web proxy load-balancing w3c

Is it valid to have paragraph elements inside of a heading tag in HTML5 (P inside H1)?...

css html w3c

How to make a "simple" GET request if the resource doesn't allow CORS?...

css cors w3c w3c-validation fetch-api

How to write good alt text for images to help screen reader and blind user to understand what is pic...

usability accessibility w3c wcag

Where is addEventListener specced for DOM 2 HTML?...

javascript dom dom-events w3c

Is there an online emulating screen reader tool to test against a custom web page?...

accessibility w3c wai-aria screen-readers

Fontawesome usage displeases W3C Validator...

html validation w3c font-awesome

What can service workers do that web workers cannot?...

javascript html service-worker web-worker w3c

How should I, according to W3C, put a canvas in clipboard?...

javascript dom-events clipboard w3c

Can we use any other TAG inside <ul> along with <li>?...

css xhtml accessibility w3c

What is the difference between 'containing block' and 'block container box' in CSS?...

css w3c

Why does 'x-www-form-urlencoded' begin with 'x-www', when other standard content typ...

http http-headers mime-types specifications w3c

Alternative for innerHTML?...

javascript w3c innerhtml

How to check what is blocked through Content-Security-Policy?...

html http header w3c content-security-policy

What does the "disown-opener" Content Security Policy directive do?...

security standards specifications w3c content-security-policy

How to understand the event which not dispatched by task queue in event loop of spec?...

javascript events dom-events specifications w3c

Use of <picture> inside <figure> element in HTML5?...

image html responsive-design w3c

Is there a semantic difference between <tag /> and <tag></tag> in XML?...

xml tags w3c

Is it possible to pass a base64 string to define the icon inside a Manifest.json?...

html dom progressive-web-apps w3c

Can I send HTTP response before completely read HTTP request?...

http tcp w3c

How does ::selection's specificity work against type selectors?...

css css-selectors w3c pseudo-element

What is the role of name="..." attribute in input?...

html xhtml w3c

Closest ancestor matching selector using native DOM?...

javascript jquery standards w3c dom-traversal

Which technologies are part of the HTML5 specification?...

html w3c