Request for amp-form and extended template reference by id

As it is done in amp-list, allow amp-form to select an extented template like this

<form method="post"
      action-xhr="https://ampbyexample.com/components/amp-form/submit-form-input-text-xhr"
      target="_top"
template="amp-template-id">
    <input type="text"
        class="data-input"
        name="name"
        placeholder="Name..."
        required>
    <input type="email"
        class="data-input"
        name="email"
        placeholder="Email..."
        required>
    <input type="submit"
        value="Subscribe"
        class="button button-primary">
  </form>

<template type="amp-mustache"
        id="amp-template-id">
      {{my_variable}}
    </template>

[cvializ]

I think the CSS selector was not well received, so we moved to an attribute instead, like

<form submit-success-template="id"></form>
<template type="amp-mustache" id="id"></template>

I was not sure what Dima meant by that, but if I had to imagine I would say that the amp-mustache extension would expose a render action that might take a data structure like the submit-success response and the id of a container optionally that would receive the rendered content.

<form on="submit-success:myTemplate.render(data=event.response, container='wow')">
</form>
<template type="amp-mustache" id="myTemplate"></template>
<div id="wow"></div>

[ampprojectbot]

This is a high priority issue but it hasn’t been updated in awhile. @danielrozenberg Do you have any updates?