HTML bdo tag (known as Bi-Directional Override tag) is used to override the current text direction. This tag is useful for changing the directionality of text, especially when dealing with languages that are written from right-to-left (RTL) or left-to-right (LTR). The <bdo> element allows developers to explicitly specify the direction of text within its scope.
Sample Code
<p>This text will display <bdo dir="rtl">backwards</bdo>.</p>Usage and Tips
- Use the <bdo> tag to correct the direction of misaligned text, especially in multi-language documents where text direction varies.
- The <bdo> tag is particularly useful for embedding snippets of text in different languages, ensuring they display in the correct direction.
- Combine <bdo> with CSS to style the overridden text appropriately, if needed.
- Ensure you specify the
dirattribute with either “rtl” (right-to-left) or “ltr” (left-to-right) to indicate the desired text direction.
Syntax
The syntax of the <bdo> tag is as follows:
<bdo dir="ltr|rtl">content</bdo>Attributes
The <bdo> tag supports the following attribute:
| Attribute | Description |
|---|---|
dir |
Specifies the text direction. Values can be “ltr” (left-to-right) or “rtl” (right-to-left). |
Example of HTML bdo Tag
Example 1
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, initial-scale=1.0">
<title>BDO Example 1</title>
</head>
<body>
<p>Normal text direction:
<bdo dir="rtl">
This will be displayed right-to-left.
</bdo>
</p>
</body>
</html>Example 2
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, initial-scale=1.0">
<title>BDO Example 2</title>
</head>
<body>
<p>Reversed text:
<bdo dir="ltr">هذا النص سيتم عرضه من اليسار إلى اليمين.</bdo></p>
</body>
</html>Browser Compatibility
Here’s the browser compatibility of the <bdo> tag across major browsers:
| Browser | Compatibility |
|---|---|
| Google Chrome | Compatible |
| Mozilla Firefox | Compatible |
| Microsoft Edge | Compatible |
| Apple Safari | Compatible |
| Opera | Compatible |
Conclusion
The HTML <bdo> tag is an essential tool for managing text directionality in web documents. By overriding the default text direction, it ensures that content is displayed correctly, whether it is left-to-right or right-to-left. This is particularly useful for multilingual websites and documents. The <bdo> tag’s support for global attributes and its compatibility across major browsers make it a reliable choice for developers aiming to control text presentation precisely.
Ref: MDN Web Docs
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