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Panel:RunJavascript

  Panel:RunJavascript( string js )
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Description

Executes a string as JavaScript code on a web document panel.

This function does NOT allow you to pass variables from JavaScript (JS) to Lua context.
If you wish to pass/return values from JS to Lua, you may want to use DHTML:AddFunction function to accomplish that job.
The Awesomium web renderer automatically delays the code execution if the document is not ready, but the Chromium web renderer does not!

This means that with Chromium, you cannot JavaScript run code immediatly after calling Panel:SetHTML or Panel:OpenURL. You should wait for the events PANEL:OnDocumentReady or PANEL:OnFinishLoadingDocument to be triggered before proceeding, otherwise you may manipulate an empty / incomplete document.

Arguments

1 string js
Specify JavaScript code to be executed.

Example

Shows how to change document.body.innerHTML property by calling this function on panel.

-- First we create a container, in this case it is a full-screen Derma Frame window. local dframe = vgui.Create( 'DFrame' ) dframe:SetSize( ScrW(), ScrH() ) dframe:SetTitle( "Garry's Mod Wiki" ) dframe:Center() dframe:MakePopup() -- Enable keyboard and mouse interaction for DFrame panel. -- Create a new DHTML panel as a child of dframe, and dock-fill it. local dhtml = vgui.Create( 'DHTML', dframe ) dhtml:Dock( FILL ) -- Navigate to Garry's Mod wikipedia website. dhtml:OpenURL( 'https://wiki.facepunch.com/gmod/' ) -- Wait for the document to load... dhtml.OnDocumentReady = function() -- Run JavaScript code. dhtml:RunJavascript( [[console.log("hello world"); document.body.innerHTML = 'HTML changed from Lua using JavaScript!';]] ) end -- This does not throw an error/exception, but instead returns nil/no value. -- That means you can't pass/return values from JavaScript back to Lua context using this function. local number = dhtml:Call( '22;' ) print( number )
Output: Inner HTML of document body in DHTML panel is now set to "HTML changed from Lua using JavaScript!".

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