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New module: CSS pseudo-elements (#28153)
* New module: CSS pseudo-elements * work in jury duty * Complete: pseudo module * slotted is functional * redundant link * added correct link * Apply suggestions from code review Co-authored-by: Dipika Bhattacharya <dipika@foss-community.org> * changed file name * File renamed * link case * remove mudule from title * intro paragraphs * Update files/en-us/web/css/css_pseudo-elements/index.md Co-authored-by: Dipika Bhattacharya <dipika@foss-community.org> * tweaks * space --------- Co-authored-by: Dipika Bhattacharya <dipika@foss-community.org>
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| --- | ||
| title: CSS pseudo-elements | ||
| slug: Web/CSS/CSS_pseudo-elements | ||
| page-type: css-module | ||
| spec-urls: https://drafts.csswg.org/css-pseudo/ | ||
| --- | ||
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| {{CSSRef}} | ||
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| The **CSS pseudo-element** module defines abstract elements that are not directly present in the document tree. These abstract elements, called pseudo-elements, represent portions of the render tree that can be selected and styled. Pseudo-elements are used to create abstractions about the document tree beyond those provided by the document tree. | ||
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| Pseudo-elements are prefixed with a double colon (`::`). You add pseudo-elements to selectors (as in `p::first-line`) to target and style these faux elements. | ||
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| Pseudo-elements enable targeting entities not included in HTML and sections of content that cannot be targeted otherwise without adding extra markup. Consider the placeholder of an {{HTMLelement("input")}} element. This is an abstract element and not a distinct node in the document tree. You can select this placeholder by using the {{CSSXref("::placeholder")}} pseudo-element. As another example, the {{CSSXref("::selection")}} pseudo-element matches the content currently highlighted by a user, allowing you to style what is matched as the user interacts with the content and changes the selection. Similarly, the {{CSSXref("::first-line")}} pseudo-element targets the first line of an element, updating automatically if the character count of the first line changes, without having to query the element's line length. | ||
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| ## Reference | ||
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| ### Selectors | ||
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| - {{CSSXref("::after")}} | ||
| - {{CSSXref("::before")}} | ||
| - {{CSSXref("::file-selector-button")}} | ||
| - {{CSSXref("::first-letter")}} | ||
| - {{CSSXref("::first-line")}} | ||
| - {{CSSXref("::grammar-error")}} | ||
| - {{CSSXref("::marker")}} | ||
| - {{CSSXref("::placeholder")}} | ||
| - {{CSSXref("::selection")}} | ||
| - {{CSSXref("::spelling-error")}} | ||
| - {{CSSXref("::target-text")}} | ||
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| ### Interfaces | ||
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| - {{DOMxRef("CSSPseudoElement")}} interface | ||
| - {{DOMxRef("CSSPseudoElement.element")}} property | ||
| - {{DOMxRef("CSSPseudoElement.type")}} property | ||
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| ### Terms | ||
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| - {{Glossary("Pseudo-element")}} glossary term | ||
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| ## Guides | ||
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| - [CSS pseudo-elements](/en-US/docs/Web/CSS/Pseudo-elements) | ||
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| - : Alphabetical list of pseudo-elements defined by all the CSS specifications and WebVTT. | ||
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| - [Building blocks: Pseudo-classes and pseudo-elements](/en-US/docs/Learn/CSS/Building_blocks/Selectors/Pseudo-classes_and_pseudo-elements) | ||
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| - : Part of CSS building blocks section on selectors. This article defines what a pseudo-element is and how it can be combined with pseudo-classes and be used for generating content with `::before` and `::after` pseudo-elements. | ||
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| - [How to create fancy boxes using pseudo-elements](/en-US/docs/Learn/CSS/Howto/Create_fancy_boxes#pseudo-elements) | ||
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| - : Example of styling generated content using `::before` and `::after` pseudo-elements for visual effects. | ||
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| ## Related concepts | ||
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| - {{cssxref("::backdrop")}} | ||
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| - Web Video Text Tracks Format (WebVTT) cues: | ||
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| - {{cssxref("::cue")}} | ||
| - {{cssxref("::cue", "::cue()")}} | ||
| - {{cssxref("::cue-region")}} | ||
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| - CSS scoping module | ||
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| - {{CSSXref(":host")}} | ||
| - {{CSSXref(":host_function", ":host()")}} | ||
| - {{CSSXref(":host-context", ":host-context()")}} | ||
| - {{CSSXref("::slotted", "::slotted()")}} | ||
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| - [CSS shadow parts](/en-US/docs/Web/CSS/CSS_shadow_parts) module | ||
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| - {{CSSXref("::part")}} | ||
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| - [CSS selectors](/en-US/docs/Web/CSS/CSS_selectors) | ||
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| - [Attribute selectors](/en-US/docs/Web/CSS/Attribute_selectors) | ||
| - [Combinators](/en-US/docs/Web/CSS/CSS_Selectors/selectors_and_combinators#combinators) | ||
| - [Class selectors](/en-US/docs/Web/CSS/Class_selectors) | ||
| - [ID selectors](/en-US/docs/Web/CSS/ID_selectors) | ||
| - [Type selectors](/en-US/docs/Web/CSS/Type_selectors) | ||
| - [Pseudo-classes](/en-US/docs/Web/CSS/Pseudo-classes) | ||
| - [Universal selectors](/en-US/docs/Web/CSS/Universal_selectors) | ||
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| - [`placeholder`](/en-US/docs/Web/HTML/Element/input#placeholder) attribute of the `<input>` element | ||
| - [`:placeholder-shown`](/en-US/docs/Web/CSS/:placeholder-shown) selector | ||
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| - [CSS generated content](/en-US/docs/Web/CSS/CSS_generated_content) | ||
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| - {{cssxref("content")}} property | ||
| - {{cssxref("quotes")}} property | ||
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| - [Text fragments](/en-US/docs/Web/Text_fragments) | ||
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| - {{DOMXref("AnimationEvent.pseudoElement")}} property | ||
| - {{DOMXref("KeyframeEffect.pseudoElement")}} property | ||
| - {{DOMXref("TransitionEvent.pseudoElement")}} property | ||
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| ## Specifications | ||
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| {{Specifications}} | ||
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| ## See also | ||
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| - [Specificity](/en-US/docs/Web/CSS/Specificity) | ||
| - [CSS selectors](/en-US/docs/Web/CSS/CSS_selectors) module | ||
| - [CSS shadow-parts](/en-US/docs/Web/CSS/CSS_shadow_parts) module | ||
| - [CSS generated content](/en-US/docs/Web/CSS/CSS_generated_content) module | ||
| - [CSS positioned layout](/en-US/docs/Web/CSS/CSS_positioned_layout) module |
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