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AMP

Actions and events in AMP email

Important: this documentation is not applicable to your currently selected format stories!

This documentation covers actions and events for the AMP email format. Read Actions and events for AMP websites, stories and ads.

The on attribute is used to install event handlers on elements. The events that are supported depend on the element.

The value for the syntax is a simple domain-specific language of the form:

eventName:targetId[.methodName[(arg1=value, arg2=value)]]

See the table below for descriptions of each part of the syntax.

Syntax Required? Description
eventName yes This is the name of the event that an element exposes.
targetId yes This is the DOM id for the element, or a predefined special target you'd like to execute an action on in response to the event. In the following example, the targetId is the DOM id of the amp-lightbox target, photo-slides.
<amp-lightbox id="photo-slides"></amp-lightbox>
<button on="tap:photo-slides">Show Images</button>
methodName no This is for elements with default actions.

This is the method that the target element (referenced by targetId) exposes and you'd like to execute when the event is triggered.

AMP has a concept of a default action that elements can implement. So when omitting the methodName AMP will execute that default method.

arg=value no Some actions, if documented, may accept arguments. The arguments are defined between parentheses in key=value notation. The accepted values are:
  • simple unquoted strings: simple-value
  • quoted strings: "string value" or 'string value'
  • boolean values: true or false
  • numbers: 11 or 1.1
  • dot-syntax reference to event data: event.someDataVariableName

Handling multiple events

You can listen to multiple events on an element by separating the events with a semicolon ;.

Example: on="submit-success:lightbox1;submit-error:lightbox2"

Multiple actions for one event

You can execute multiple actions in sequence for the same event by separating the actions with a comma ','.

Example: on="tap:target1.actionA,target2.actionB"

Globally-defined events and actions

AMP defines a tap event globally that you can listen to on any HTML element (including AMP elements).

AMP also defines the hide, show and toggleVisibility actions globally that you can trigger on any HTML element.

An element can only be shown if it was previously hidden by a hide or toggleVisibility action, or by using the hidden attribute. The show action does not support elements hidden by CSS display:none or AMP's layout=nodisplay.

For example, the following is possible in AMP:

<div id="warning-message">Warning...</div>

<button on="tap:warning-message.hide">Cool, thanks!</button>

Element-specific events

* - all elements

Event Description
tap Fired when the element is clicked/tapped.

Input elements

Event Description Elements Data
change Fired when the value of the element is changed and committed.

Data properties mirror those in HTMLInputElement and HTMLSelectElement.

input
event.min
event.max
event.value
event.valueAsNumber
input[type="radio"],
input[type="checkbox"]
event.checked
select
event.min
event.max
event.value
input-debounced Fired when the value of the element is changed. This is similar to the standard change event, but it only fires when 300ms have passed after the value of the input has stopped changing. Elements that fire input event. Same as change event data.
input-throttled Fired when the value of the element is changed. This is similar to the standard change event, but it is throttled to firing at most once every 100ms while the value of the input is changing. Elements that fire input event. Same as change event data.

amp-accordion > section

Event Description Data
expand Fired when an accordion section expands. None.
collapse Fired when an accordion section collapses. None.

amp-carousel[type="slides"]

Event Description Data
slideChange Fired when the carousel's current slide changes.
// Slide number.
event.index

amp-lightbox

Event Description Data
lightboxOpen Fired when lightbox is fully visible. None
lightboxClose Fired when lightbox is fully closed. None

amp-list

Event Description Data
fetch-error(low-trust) Fired when fetching data fails. None

amp-selector

Event Description Data
select Fired when an option is selected or deselected.
// Target element's "option" attribute value.
event.targetOption
// Array of "option" attribute values of all selected elements.
event.selectedOptions

amp-sidebar

Event Description Data
sidebarOpen Fired when sidebar is fully opened after transition has ended. None
sidebarClose Fired when sidebar is fully closed after transition has ended. None

amp-state

Event Description Data
fetch-error(low-trust) Fired when fetching data fails. None

form

Event Description Data
submit Fired when the form is submitted.
submit-success Fired when the form submission response is success.
// Response JSON.
event.response
submit-error Fired when the form submission response is an error.
// Response JSON.
event.response
valid Fired when the form is valid.
invalid Fired when the form is invalid.

Element-specific actions

* (all elements)

Action Description
hide Hides the target element.
show Shows the target element. If an autofocus element becomes visible as a result, it gains focus.
toggleVisibility Toggles the visibility of the target element. If an autofocus element becomes visible as a result, it gains focus.
toggleClass(class=STRING, force=BOOLEAN) Toggles class of the target element. force is optional, and if defined, it ensures that class would only be added but not removed if set to true, and only removed but not added if set to false.
focus Makes the target element gain focus. To lose focus, focus on another element (usually parent element). We strongly advise against losing focus by focusing on body/documentElement for accessibility reasons.

amp-accordion

Action Description
toggle(section=STRING) Toggles the expanded and collapsed states of amp-accordion sections. When called with no arguments, it toggles all sections of the accordion. Trigger on a specific section by providing the section id: on="tap:myAccordion.toggle(section='section-id')".
expand(section=STRING) Expands the sections of the accordion. If a section is already expanded, it stays expanded. When called with no arguments, it expands all sections of the accordion. Trigger on a specific section by providing the section id: on="tap:myAccordion.expand(section='section-id')".
collapse(section=STRING) Collapses the sections of the accordion. If a section is already collapsed, it stays collapsed. When called with no arguments, it collapses all sections of the accordion. Trigger on a specific section by providing the section id: on="tap:myAccordion.collapse(section='section-id')".

amp-carousel[type="slides"]

Action Description
goToSlide(index=INTEGER) Advances the carousel to a specified slide index.

amp-image-lightbox

Action Description
open (default) Opens the image lightbox with the source image being the one that triggered the action.

amp-lightbox

Action Description
open (default) Opens the lightbox.
close Closes the lightbox.

amp-list

Event Description Data
changeToLayoutContainer Update's amp-list's layout to layout="CONTAINTER" to allow dynamic resizing.
fetch-error(low-trust) Fired when fetching data fails. None

amp-selector

Action Description
clear Clears all selections from a defined amp-selector.
selectUp(delta=INTEGER) Moves the selection up by the value of delta. The default delta is set to -1. If no options are selected, the selected state will become the value of the last option.
selectDown(delta=INTEGER) Moves the selection down by the value of delta. The default delta is set to 1. If no options are selected, the selected state will become the value of the first option.
toggle(index=INTEGER, value=BOOLEAN) Toggles the application of the selected. If the select attribute is absent, this action adds it. If the select attribute is present, this action removes it. You may force and keep an add or remove by including a boolean value in the value argument. A value of true will force add the selected attribute and not remove it if already present. A value of false will remove the attribute, but not add it if absent.

amp-sidebar

Action Description
open (default) Opens the sidebar.
close Closes the sidebar.
toggle Toggles the state of the sidebar.

form

Action Description
clear Clears any values in the form's inputs.
submit Submits the form.

Special targets

The following are targets provided by the AMP system that have special requirements:

Target: AMP

The AMP target is provided by the AMP runtime and implements top-level actions that apply to the whole document.

Action Description
setState({foo: 'bar'})1

Requires amp-bind.

Merges an object literal into the bindable state.

1When used with multiple actions, subsequent actions will wait for setState() to complete before invocation. Only a single setState() is allowed per event.