How HTML changes in ePub
How HTML and CSS behave inside ePub ebooks.
HTML news — Page 3
Top layer troubles: popover vs dialog
Why toast popovers can float above dialogs yet stay unreachable, and how to fix the top-layer trap.
Dialog and popover: layered UI patterns
Built-in layered UI with focus, top layer, and animations handled for you.
HTML
popoverattribute in practiceCovers implicit anchors, auto vs manual vs hint modes, and JS control for accessible popovers.
A complete guide to the
<input type="number">A detailed walkthrough of the input number, its quirks and best practices in modern browsers.
Simple one-time passcode inputs
Using just HTML and a few attributes, you can build accessible and reliable OTP forms.
HTML’s best kept secret: the
<output>tagRediscover the forgotten HTML element that improves accessibility.
Searchable, collapsible sections with
hidden="until-found"Enhancing collapsible sections with progressive discovery and better find-in-page support.
setHTML(), Trusted Types and the Sanitizer APINew setHTML() and Sanitizer API prevent XSS by safely inserting HTML into the DOM.
A native way of having more than one thumb on a range slider in HTML
Proposed
element for multi-thumb range sliders with ::slider-thumb() styling. 
Abandonware of the web: do you know that there is an HTML tables API?
Built-in DOM methods like insertRow and insertCell make building and querying tables easier.
Screen reader HTML support
Compatibility table of HTML elements in JAWS, NVDA, VoiceOver, and TalkBack.