JavaScript-Livecode integration question

Heriberto Torrado htorrado at
Thu Jun 18 16:12:51 EDT 2020

Hi Ralph,

Thanks you very much for your quick response!

I found some information about the command 
"revBrowserAddJavaScriptHandler", but you say I can use the command 
it's that new? I cannot find information about it on the Livecode 

Anyway, I'm going to try it and I'll tell you if it works.

I think a lot of  people will ask me why I want to do that, and why I 
just don't use Electron.. :-)
I don't want to create a flame, so this these are my reasons.

1) I have an strong background with HTML, CSS and Javascript, but I love 
Livecode scripting (especially its strong text manipulation options.).
2) If you use the Indy edition, it's easy to hide the code (passwords, 
command calls, etc). It's not possible to do it with Electron or NW.js 
(NW.js has more options to do that, but they are far to be ideal).
3) I don't like nodejs: promises, asynchronous technology, difficult 
tracing errors, etc.


On 6/18/20 3:21 PM, Ralph DiMola via use-livecode wrote:
> Heriberto,
> LC makes it easy... Works for me on Mobile also.
> In LC do this once.
> set the javascriptHandlers of widget "MyBrowerWidget" to "LCHandlerName"
> Create this handler:
> command LCHandlerName pNum
> answer pNum
> end LCHandlerName
> Javascript:
> liveCode.LCHandlerName('315');
> Ralph DiMola
> IT Director
> Evergreen Information Services
> rdimola at
> -----Original Message-----
> From: use-livecode [mailto:use-livecode-bounces at] On Behalf Of Heriberto Torrado via use-livecode
> Sent: Thursday, June 18, 2020 2:27 PM
> To: use-livecode at
> Cc: Heriberto Torrado
> Subject: JavaScript-Livecode integration question
> Dear LiveCode programmers.
> I have a question about the Livecode-Javascript integration.
> I love LiveCode, but IMO I think CSS+HTML+JS are better technologies for styling applications (it is just a personal opinion).
> So, I'm trying  to create Deskops apps using JS+HTML+CSS for the "front"
> and LiveCode for  the "back-end".
> I'm using the CEF embedded browser.
> My idea is to create something like Electron or NW.js but using Livecode.
> Note that I'm talking about Desktop apps, not Web apps.
> I have managed to send data from Livecode to JavaScript using the instruction  "do "document.getElementById -xxxxxx" in widget "Browser", but I'm stuck doing the opposite.
> My idea is to send an event or data from the CEF to Livecode when someone press a button on the CEF embedded browser.
> I found the documentation confused and I'd like to have, if it is possible, a real example about how to do that.
> Another question: Does it works on Android/Apple? I'm afraid it won't work
> Thanks a lot.
> PS: I'm going to try to answer you guys as soon as possible, but sometimes I have to read your responses on the use-livecode mail list archives , because our mail server has the ugly habit of blocking some emails that come from the list.


Best regards/ Saludos cordiales/ Cordialement

Heriberto Torrado
​Chief Technology Officer (CTO)
​Director de informática
Directeur informatique

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