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HTML <bdi> Tag

The <bdi> tag (bidirectional isolation) is one of the HTML5 elements. It is used to isolate bidirectional text (when a language with right-to-left directionality, such as Arabic or Hebrew, is used in line with left-to-right languages). Note, that the <bdi> tag does not physically turn the text, it only tells the browser that the text should be read in the opposite direction.


The <bdi> tag comes in pairs; the content is written between the opening (<bdi>) and the closing (</bdi>) tags.


<!DOCTYPE html>
    <title>Title of the document</title>
    <h1> Example of using the bdi element </h1>
    <p dir="ltr"><bdi>أرمينيا جميلة</bdi> This sentence in Arabic is automatically displayed from right to left.</p>



The <bdi> tag supports the Global Attributes and the Event Attributes.

How to style <bdi> tag

Common properties to alter the visual weight/emphasis/size of text in <bdi> tag:?

  • CSS font-style property sets the style of the font. normal | italic | oblique | initial | inherit
  • CSS font-family property specifies a prioritized list of one or more font family names and/or generic family names for the selected element.
  • CSS font-size property sets the size of the font.
  • CSS font-weight property defines whether the font should be bold or thick. CSS text-transform Property controls text case and capitalization.
  • CSS text-decoration property specifies the decoration added to text, and is a shorthand property for text-decoration-line, text-decoration-color, text-decoration-style

Coloring text in <bdi> tag:

  • CSS color property describes the color of the text content and text decorations
  • CSS background-color property sets the background color of an element.

Text layout styles for <bdi> tag:

  • CSS text-indent property specifies the indentation of the first line in a text block.
  • CSS text-overflow property specifies how overflowed content that is not displayed should be signaled to the user.
  • CSS white-space property specifies how white-space inside an element is handled.
  • CSS word-break property specifies where the lines should be broken.

Other properties worth looking at for <bdi> tag

Browser support

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