butterfly/kb
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
bfa66fc0f8
kb/data/developer.mozilla.org/en-US/docs/Glossary/BiDi-0.md

184 lines
10 KiB
Markdown
Raw Blame History

---
title: "BiDi - Glossary | MDN"
chunk: 1/3
source: "https://developer.mozilla.org/en-US/docs/Glossary/BiDi"
category: "reference"
tags: "web, html, css, javascript, documentation"
date_saved: "2026-05-05T05:25:02.794441+00:00"
instance: "kb-cron"
---
* [Skip to main content](https://developer.mozilla.org/en-US/docs/Glossary/BiDi#content)
* [Skip to search](https://developer.mozilla.org/en-US/docs/Glossary/BiDi#search)
[ MDN ](https://developer.mozilla.org/en-US/)
HTML
[HTML: Markup language](https://developer.mozilla.org/en-US/docs/Web/HTML)
HTML reference
* [Elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements)
* [Global attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Global_attributes)
* [Attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Attributes)
* [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Reference "See all HTML references")
HTML guides
* [Responsive images](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Responsive_images)
* [HTML cheatsheet](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Cheatsheet)
* [Date & time formats](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides/Date_and_time_formats)
* [See all…](https://developer.mozilla.org/en-US/docs/Web/HTML/Guides "See all HTML guides")
Markup languages
* [SVG](https://developer.mozilla.org/en-US/docs/Web/SVG)
* [MathML](https://developer.mozilla.org/en-US/docs/Web/MathML)
* [XML](https://developer.mozilla.org/en-US/docs/Web/XML)
CSS
[CSS: Styling language](https://developer.mozilla.org/en-US/docs/Web/CSS)
CSS reference
* [Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties)
* [Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Selectors)
* [At-rules](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules)
* [Values](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Values)
* [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference "See all CSS references")
CSS guides
* [Box model](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Box_model/Introduction)
* [Animations](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Animations/Using)
* [Flexbox](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Flexible_box_layout/Basic_concepts)
* [Colors](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Applying_color)
* [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides "See all CSS guides")
Layout cookbook
* [Column layouts](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Column_layouts)
* [Centering an element](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element)
* [Card component](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Card)
* [See all…](https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook)
JavaScriptJS
[JavaScript: Scripting language](https://developer.mozilla.org/en-US/docs/Web/JavaScript)
JS reference
* [Standard built-in objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects)
* [Expressions & operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators)
* [Statements & declarations](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements)
* [Functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions)
* [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference "See all JavaScript references")
JS guides
* [Control flow & error handing](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling)
* [Loops and iteration](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration)
* [Working with objects](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_objects)
* [Using classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_classes)
* [See all…](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide "See all JavaScript guides")
Web APIs
[Web APIs: Programming interfaces](https://developer.mozilla.org/en-US/docs/Web/API)
Web API reference
* [File system API](https://developer.mozilla.org/en-US/docs/Web/API/File_System_API)
* [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API)
* [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API)
* [HTML DOM API](https://developer.mozilla.org/en-US/docs/Web/API/HTML_DOM_API)
* [Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API)
* [Service worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API)
* [See all…](https://developer.mozilla.org/en-US/docs/Web/API "See all Web API guides")
Web API guides
* [Using the Web animation API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Animations_API/Using_the_Web_Animations_API)
* [Using the Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch)
* [Working with the History API](https://developer.mozilla.org/en-US/docs/Web/API/History_API/Working_with_the_History_API)
* [Using the Web speech API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API/Using_the_Web_Speech_API)
* [Using web workers](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers)
All
[All web technology](https://developer.mozilla.org/en-US/docs/Web)
Technologies
* [Accessibility](https://developer.mozilla.org/en-US/docs/Web/Accessibility)
* [HTTP](https://developer.mozilla.org/en-US/docs/Web/HTTP)
* [URI](https://developer.mozilla.org/en-US/docs/Web/URI)
* [Web extensions](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions)
* [WebAssembly](https://developer.mozilla.org/en-US/docs/WebAssembly)
* [WebDriver](https://developer.mozilla.org/en-US/docs/Web/WebDriver)
* [See all…](https://developer.mozilla.org/en-US/docs/Web "See all web technology references")
Topics
* [Media](https://developer.mozilla.org/en-US/docs/Web/Media)
* [Performance](https://developer.mozilla.org/en-US/docs/Web/Performance)
* [Privacy](https://developer.mozilla.org/en-US/docs/Web/Privacy)
* [Security](https://developer.mozilla.org/en-US/docs/Web/Security)
* [Progressive web apps](https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps)
Learn
[Learn web development](https://developer.mozilla.org/en-US/docs/Learn_web_development)
Frontend developer course
* [Getting started modules](https://developer.mozilla.org/en-US/docs/Learn_web_development/Getting_started)
* [Core modules](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core)
* [MDN Curriculum](https://developer.mozilla.org/en-US/curriculum/)
* [Check out the video course from Scrimba, our partner](https://scrimba.com/frontend-path-c0j?via=mdn-learn-navbar)
Learn HTML
* [Structuring content with HTML module](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Structuring_content)
Learn CSS
* [CSS styling basics module](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Styling_basics)
* [CSS layout module](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/CSS_layout)
Learn JavaScript
* [Dynamic scripting with JavaScript module](https://developer.mozilla.org/en-US/docs/Learn_web_development/Core/Scripting)
Tools
Discover our tools
* [Playground](https://developer.mozilla.org/en-US/play)
* [HTTP Observatory](https://developer.mozilla.org/en-US/observatory)
* [Border-image generator](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Backgrounds_and_borders/Border-image_generator)
* [Border-radius generator](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Backgrounds_and_borders/Border-radius_generator)
* [Box-shadow generator](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Backgrounds_and_borders/Box-shadow_generator)
* [Color format converter](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Color_format_converter)
* [Color mixer](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Colors/Color_mixer)
* [Shape generator](https://developer.mozilla.org/en-US/docs/Web/CSS/Guides/Shapes/Shape_generator)
About
Get to know MDN better
* [About MDN](https://developer.mozilla.org/en-US/about)
* [Advertise with us](https://developer.mozilla.org/en-US/advertising)
* [Community](https://developer.mozilla.org/en-US/community)
* [MDN on GitHub](https://github.com/mdn)
[Blog](https://developer.mozilla.org/en-US/blog/)
1. [Glossary](https://developer.mozilla.org/en-US/docs/Glossary)
2. [BiDi](https://developer.mozilla.org/en-US/docs/Glossary/BiDi)
# BiDi
**BiDi** (BiDirectional) describes a document that contains both right-to-left (RTL) and left-to-right (LTR) text.
User Interfaces should display BiDi content correctly, but many fail. An example is the Hebrew translation of the name Sarah: שרה, spelled (from right-to-left) sin (ש), resh (ר), heh (ה). Many programs would display the letters in the opposite order.
It is possible to flip the left-to-right display order to a right-to-left display order, but doing this sacrifices the ability to display BiDi scripts correctly — at least one is always incorrectly displayed. With bidirectional script support, it is possible to mix characters from different scripts on the same page, regardless of writing direction.
The Unicode standard provides foundations for complete BiDi support, with detailed rules as to how mixtures of left-to-right and right-to-left scripts are to be encoded and displayed.
## In this article
* [See also](https://developer.mozilla.org/en-US/docs/Glossary/BiDi#see_also)
## [See also](https://developer.mozilla.org/en-US/docs/Glossary/BiDi#see_also)
* Related glossary terms:
* [Unicode](https://developer.mozilla.org/en-US/docs/Glossary/Unicode)
* [Bi-directional text](https://en.wikipedia.org/wiki/Bi-directional_text) on Wikipedia
* [UAX#9: Unicode Bi-directional Algorithm](https://www.unicode.org/reports/tr9)
Reference in New Issue View Git Blame Copy Permalink