HTML <isindex> tag (Not supported in HTML5)
HTML <isindex> tag is used to provide a single line text input in a page to query a document. If user sent input to the server then server returns the list of page matching with the query.
The <isindex> tag can be used anywhere in the document, but it would be preferable to use it within <head> tag.
Note: Do not use <isindex> tag as it is not supported by HTML5, instead of it you can use form <input> which will do the same work.
Following are some specifications about the HTML <isindex> tag
ExampleTest it Now
HTML <isindex> tag supports the Global Attributes.
HTML <isindex> tag supports the Event Attributes.