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__AddEvent

Introduction

Adds an Event Listener to the Element object.

Syntax

__AddEvent(element: Element, type: string, name: string, listener: string|Function) : void;

Parameters

Key Description
element Any Element object.
type A case-sensitive string representing the type of the event to listen for.
name A case-sensitive string representing the name of the event to listen for.
listener The listener can be a case-sensitive string, or it can be null or undefined.
  • When the listener is a case-sensitive string, upon triggering the listened event, the Lynx SDK will send the current Element's parentComponentUniqueID, listener, and event to the background thread.
  • When the listener is null or undefined, the Lynx SDK will remove the corresponding listener for the specified type and name from the Element object.
Note

Due to limitations of the Lynx SDK, currently, only one listener can be added for the same type and name. Adding a listener with the same type and name again will overwrite the previously added listener.

Return Value

No return value.

Example

The frontend framework can generate render directives in the following way.

<view src="xxx" bindtap="onTap" />
// main-thread.js
let element = __CreateElement('view', 0, {});
__SetAttribute(element, 'src', 'xx');
__AddEvent(element, 'bindEvent', 'tap', 'onTap');
Except as otherwise noted, this work is licensed under a Creative Commons Attribution 4.0 International License, and code samples are licensed under the Apache License 2.0.