X-Up-Origin-Mode

This request header contains the mode of the layer from which the interaction originated.

Links or forms may target another layer than their own. The targeted layer is sent as an X-Up-Mode header.

Example

Assume we have the following link in a modal overlay. The link targets the root layer:

<!-- label: Link within an overlay -->
<a href="/" up-follow up-layer="root">Click me</a> <!-- mark: up-layer -->

When the link is clicked, the following request headers are sent:

X-Up-Mode: root
X-Up-Origin-Mode: modal

The origin element is automatically set for many actions, for example:

Action	Origin element
Submitting a form with submit button	The submit button
Submitting a form by pressing `Return`	The focused field
Following a link	The link
Preloading a link	The link
Validating a field	The changed field
Auto-submitting a field	The changed field
Loading deferred content	The `[up-defer]` placeholder

When the origin element is unknown, this header is not sent.