Internationalization and localization tools/Support of HTML RTL features in browsers

This is a summary of support of right-to-left (RTL) and bidirectional (BiDi) writing features in different browsers. It's not limited only to the new HTML5 features (bdi, dir="auto" etc.) - the intention is to include also the differences in implementation details of HTML4 BiDi features and DOM behavior.

A question mark (?) indicates that it is not known whether a browser supports the feature.

A number indicates the first version of a browser which supports the feature.

Feature	proper autotest	simplistic autotest	comment	MSIE	Firefox	Chrome	Safari	Opera
<bdi>	in development	<bdi>אחד</bdi>, <bdi>שתיים</bdi>	Sanitized in MediaWiki	?	10?	?	?	?
dir="auto"	in development	וואללה!		?	12?	13	?	?
dir="auto" on <textarea>	in development			?	?	?	?	?
dir="auto" on <pre>	in development	<span		?	?	?	?	?
dirname attribute	?	?		?	?	?	?	?
CSS "unicode-bidi: isolate" is default for block elements if not "display: inline"	?	?		?	?	?	?	?
<br /> as a bidi separator	submitted to W3C for review	?		?	7	?	?	?
<pre> line break as a bidi separator	in development	?		?	?	?	?	?
<textarea> line break as a bidi separator	in development	?		?	?	?	?	?
line feed in script dialogs (alert etc.) as a bidi separator	?	?		?	?	?	?	?
<title> directionality	?	?		?	?	?	?	?
<option> directionality	?	?		?	?	?	?	?
tooltips directionality	?	?		?	?	?	?	?
<input type="text"> interactive directionality switchable	?	?		?	?	?	?	?
<input type="text"> dir attribute changes on request	?	?		?	?	?	?	?
<input type="text"> direction change triggers oninput	?	?		?	?	?	?	?
<input type="search"> interactive directionality switchable	?	?		?	?	?	?	?
<input type="search"> dir attribute changes on request	?	?		?	?	?	?	?
<input type="search"> direction change triggers oninput	?	?		?	?	?	?	?
<textarea> interactive directionality switchable	?	?		?	?	?	?	?
<textarea> dir attribute changes on request	?	?		?	?	?	?	?
<textarea> direction change triggers oninput	?	?		?	?	?	?	?
CSS "unicode-bidi: isolate"	?	אחד, שתיים		?	?	?	?	?
<textarea style="unicode-bidi: plaintext"> - per-paragraph auto-direction	?	?	On by default in Chrome; off in Fx	?	10?	15	?	?
<pre style="unicode-bidi: plaintext"> - per-paragraph auto-direction	?	?		?	?	?	?	?
ltr/rtl for image() in CSS	?	?		?	?	?	?	?
CSS line and paragraph separators as white-space ???	?	?		?	?	?	?	?
CSS anonymous block boxes ???	?	?		?	?	?	?	?
CSS match-parent ???	?	?		?	?	?	?	?
Change text fields direction	?	?		Ctrl-Shift	Ctrl-Shift-X Ctrl-Shift on Windows since Aurora 10	Ctrl-Shift	?	?
autodirmethod="first-strong"	?	?		?	?	?	?	?
autodirmethod="any-rtl"	?	?		?	?	?	?	?
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