ChildNode.remove()
DOM node method to remove the node itself from the document.
CSS display: contents
`display: contents` causes an element's children to appear as if they were direct children of the element's parent, ignoring the element itself. This can be useful when a wrapper element should be ignored when using CSS grid or similar layout techniques.
:has() CSS relational pseudo-class
Select elements containing specific content. For example, `a:has(img)` selects all `<a>` elements that contain an `<img>` child.
CSS Nesting
CSS nesting provides the ability to nest one style rule inside another, with the selector of the child rule relative to the selector of the parent rule. Similar behavior previously required a CSS pre-processor.
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.
CSS 2.1 selectors
Basic CSS selectors including: `*` (universal selector), `>` (child selector), `:first-child`, `:link`, `:visited`, `:active`, `:hover`, `:focus`, `:lang()`, `+` (adjacent sibling selector), `[attr]`, `[attr="val"]`, `[attr~="val"]`, `[attr|="bar"]`, `.foo` (class selector), `#foo` (id selector)
CSS3 selectors
Advanced element selection using selectors including: `[foo^="bar"]`, `[foo$="bar"]`, `[foo*="bar"]`, `:root`, `:nth-child()`, `:nth-last-child()`, `:nth-of-type()`, `:nth-last-of-type()`, `:last-child`, `:first-of-type`, `:last-of-type`, `:only-child`, `:only-of-type`, `:empty`, `:target`, `:enabled`, `:disabled`, `:checked`, `:not()`, `~` (general sibling)
Details & Summary elements
The <details> element generates a simple no-JavaScript widget to show/hide element contents, optionally by clicking on its child <summary> element.
DOM manipulation convenience methods
jQuery-like methods on DOM nodes to insert nodes around or within a node, or to replace one node with another. These methods accept any number of DOM nodes or HTML strings as arguments. Includes: `ChildNode.before`, `ChildNode.after`, `ChildNode.replaceWith`, `ParentNode.prepend`, and `ParentNode.append`.
Element.insertAdjacentElement() & Element.insertAdjacentText()
Methods for inserting an element or text before or after a given element, or appending or prepending an element or text to a given element's list of children.
documentfragment api: childelementcount
documentfragment api: children
documentfragment api: firstelementchild
documentfragment api: lastelementchild
documentfragment api: replacechildren
document api: childelementcount
document api: children
document api: firstelementchild
document api: lastelementchild
document api: replacechildren
element api: childelementcount
element api: children
element api: firstelementchild
element api: lastelementchild
element api: replacechildren
node api: appendchild
node api: childnodes
node api: firstchild
node api: haschildnodes
node api: lastchild
node api: removechild
node api: replacechild
notrestoredreasons api: children
selection api: selectallchildren
treewalker api: firstchild
treewalker api: lastchild
css property: position: absolutely-positioned flex children
css selector: child combinator (`a > b`)
css selector: `:first-child`
css selector: `:first-child`: matches elements with no parent
css selector: `:last-child`
css selector: `:last-child`: matches elements with no parent
css selector: `:nth-child()`
css selector: `:nth-child()`: matches elements with no parent
css selector: `:nth-last-child()`
css selector: `:nth-last-child()`: matches elements with no parent
css selector: `:nth-last-child()`: `of <selector>` syntax
css selector: `:only-child`
css selector: `:only-child`: matches elements with no parent
headers http header: content-security-policy: child-src
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