Statically in RML

The easiest way to attach to events with Lua is to write your code directly into the RML files, using the on* attributes. When the event is fired three global variables are set up, document, event and element.

Example:

<button onclick="print('Clicked!')"/>

Multiple statements can be called as in normal Lua.

Example:

<button onclick="print('Line 1') print('Line 2')"/>

Dynamically from Lua Code

The Lua version of AddEventListener is modeled directly on Javascript. This allows you to bind any callable Lua function or string to an event.

Method 1:

function Init(document)			
	element = document:GetElementById('button')
	element:AddEventListener('click', "print('Line 1') print('Line 2')", true)
end

Method 2:

function OnClick()
	for i=1,10 do print('Line ' .. i) end
end

function Init(document)			
	element = document:GetElementById('button')
	element:AddEventListener('click', OnClick, true)
end