LiveCode Forums.

In the Guide in the Dictionary it says:

"The browser allows two-way interaction with the javascript running in the displayed page. To allow LiveCode handlers to be called from JavaScript, there is a javascriptHandlers property. This can be set to a list of LiveCode handlers which appear as methods attached to a global liveCode object. You can call these methods as you would any other JavaScript function and pass whatever parameters you require."

In the API under javascriptHandlers it gives an example:

-- Define a handler to respond to javascript calls.
on myJSHandler pMessage, pValue
-- Do appropriate actions here.
-- ...
end myJSHandler

-- Set up the browser javascript handler list
-- This code goes in a suitable setup handler
set the javascriptHandlers to "myJSHandler" & return & "myOtherJSHandler"

// Calling the handler from JavaScript within the browser
liveCode.myJSHandler("myMessage", 12345);

I have set up the javascriptHandlers property in the card script containing the Browser widget:

on hJS_wordCount pNumber
set label of button "wordCount" to pNumber
end hJS_wordCount

set the javascriptHandlers to "hJS_wordCount"

However, the JavaScript in the web page being displayed does not seem to be able to find 'a global liveCode object'. It is being called like this:

liveCode.hJS_wordCount(myDirection.length);

But the call is not being processed and the 'global liveCode object' appears to be undefined.

How do we define/instantiate this global liveCode object in order to access its methods?

Thanks in advance.

Hi Mark,
should do the trick

Best

Klaus

Thanks Klaus,

My card script now has:

set the javascriptHandlers of widget "Browser" to "hJS_wordCount"

But the JavaScript in the web page still isn't managing to call the hJS_wordCount handler.

Any more thoughts?

No, sorry

Your settings are correct.

You could try If this works then your javascript/htmltext is the problem.

Thanks -hh,

After playing around with things, it's now working.

I used Klaus's suggestion of set the javascriptHandlers of widget "Browser" to "hJS_wordCount"

I then used the sample LiveCode stack provided by LCNeil in the thread: "Passing arguments to Javascript from Livecode"

This uses a stack custom property "cHTML" to store the HTML. After establishing a JavaScript connection using that method, when I reverted to a remotely loaded URL, and it just worked.