# How do we add a single-line input field in HTML?

HTMLWeb DevelopmentFront End Technology

Use the <isindex> tag to add a single-line input field. The HTML <isindex> tag is used for querying a document through a text field. The tag can be used anywhere but head tag is preferable. Note: It is a deprecated tag and should not be used.

The following are the attributes −

Attribute
Value
Description
Prompt
string
Label for the text field
Action
URL
used when a query needs to be sent to a different URL

## Example

Try the following code −

<!Doctype html>
<html>
</html>