Method of easily manipulating classes on elements, using the `DOMTokenList` object.
CSS :any-link selector
The `:any-link` CSS pseudo-class matches all elements that match `:link` or `:visited`
:default CSS pseudo-class
The `:default` pseudo-class matches checkboxes and radio buttons which are checked by default, `<option>`s with the `selected` attribute, and the default submit button (if any) of a form.
:dir() CSS pseudo-class
Matches elements based on their directionality. `:dir(ltr)` matches elements which are Left-to-Right. `:dir(rtl)` matches elements which are Right-to-Left.
::first-letter CSS pseudo-element selector
CSS pseudo-element that allows styling only the first "letter" of text within an element. Useful for implementing initial caps or drop caps styling.
:focus-visible CSS pseudo-class
The `:focus-visible` pseudo-class applies while an element matches the `:focus` pseudo-class, and the UA determines via heuristics that the focus should be specially indicated on the element (typically via a “focus ring”).
:focus-within CSS pseudo-class
The `:focus-within` pseudo-class matches elements that either themselves match `:focus` or that have descendants which match `:focus`.
:has() CSS relational pseudo-class
Only select elements containing specified content. For example, `a:has(>img)` selects all `<a>` elements that contain an `<img>` child.
:in-range and :out-of-range CSS pseudo-classes
If a temporal or number `<input>` has `max` and/or `min` attributes, then `:in-range` matches when the value is within the specified range and `:out-of-range` matches when the value is outside the specified range. If there are no range constraints, then neither pseudo-class matches.
:indeterminate CSS pseudo-class
The `:indeterminate` pseudo-class matches indeterminate checkboxes, indeterminate `<progress>` bars, and radio buttons with no checked button in their radio button group.
:is() CSS pseudo-class
The `:is()` (formerly `:matches()`, formerly `:any()`) pseudo-class checks whether the element at its position in the outer selector matches any of the selectors in its selector list. It's useful syntactic sugar that allows you to avoid writing out all the combinations manually as separate selectors. The effect is similar to nesting in Sass and most other CSS preprocessors.
selector list argument of :nth-child and :nth-last-child CSS pseudo-classes
The newest versions of `:nth-child()` and `:nth-last-child()` accept an optional `of S` clause which filters the children to only those which match the selector list `S`. For example, `:nth-child(1 of .foo)` selects the first child among the children that have the `foo` class (ignoring any non-`foo` children which precede that child). Similar to `:nth-of-type`, but for arbitrary selectors instead of only type selectors.
:optional CSS pseudo-class
The `:optional` pseudo-class matches form inputs (`<input>`, `<textarea>`, `<select>`) which are not `:required`.
:placeholder-shown CSS pseudo-class
Input elements can sometimes show placeholder text as a hint to the user on what to type in. See, for example, the placeholder attribute in HTML5. The :placeholder-shown pseudo-class matches an input element that is showing such placeholder text.
CSS :read-only and :read-write selectors
:read-only and :read-write pseudo-classes to match elements which are considered user-alterable
ECMAScript 2015 (ES6)
Support for the ECMAScript 2015 specification. Features include Promises, Modules, Classes, Template Literals, Arrow Functions, Let and Const, Default Parameters, Generators, Destructuring Assignment, Rest & Spread, Map/Set & WeakMap/WeakSet and many more.
ES6 classes are syntactical sugar to provide a much simpler and clearer syntax to create objects and deal with inheritance.
Method of accessing DOM elements by class name
Defines a base orientation sensor interface and concrete sensor subclasses to monitor the device’s physical orientation in relation to a stationary three dimensional Cartesian coordinate system.
Method of easily manipulating rel attribute values on elements, using the DOMTokenList object (similar to classList).
document api: getelementsbyclassname
domtokenlist api: contains
element api: classname
element api: getelementsbyclassname
svgelement api: classname
usbalternateinterface api: interfaceclass
usbalternateinterface api: interfacesubclass
usbdevice api: deviceclass
usbdevice api: devicesubclass
css selector: class selector (`.classname`)
css selector: first page pseudo-class (`:first`)
css selector: left-hand page pseudo-class (`:left`)
css selector: negation pseudo-class selector (`:not()`)
css selector: right-hand page pseudo-class (`:right`)
html element: object: classid
html attribute: class
attributes: style: class
attributes: style: class: animation support