htmx/www/extensions/include-vals.md

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The include-vals Extension

The include-vals extension allows you to programatically include values in a request with a include-vals attribute. The value of this attribute is one or more name/value pairs, which will be evaluated as the fields in a javascript object literal.

Usage

<div hx-ext="include-vals">
    <div hx-get="/test" include-vals="included:true, computed: computeValue()">
      Will Include Additional Values
    </div>
</div> 

Source

https://unpkg.com/htmx.org/dist/ext/include-vals.js