Event

Wiki ▸ API Reference ▸ Event

Utilities for handling event delegation, normalization between touch and mouse/trackpad events, custom events, and tying events to blocks.

---

# Event.off(elem, eventname, handler)

Removes an event handler.

• elem: The elements that will have the event removed.
• eventname: A string representing the event type being removed.
• handler: The handler to be removed.

===

# Event.on(elem, eventname, selector, handler[, onceOnly])

Attaches an event handler function for one or more events to the selected elements.

• elem: An element or a selector string that will have the event attached.
• eventname: A string representing the event type to listen for.
• selector: A selector that the handler executes on.
• handler: A function to execute when the event is triggered.
• onceOnly: true if the event is only handled once; false otherwise.

===

# Event.once(elem, eventname, selector, handler)

Registers an event handler on the event target and removes it immediately after the event is fired.

• elem: An element or a selector that will have the event attached.
• eventname: A string representing the event type to listen for once.
• selector: A selector that the handler executes on
• handler: A function to execute when the event is triggered.

===

# Event.trigger(elemOrSelector, eventname, data)

Executes all handlers and behaviors attached to the matched elements for the given event type.

• elemOrSelector: An element or a selector that will have the event triggered.
• eventname: A string representing the event type to be triggered.
• data: An object providing custom information about the event.