Do javascript function in browser widget?

Tue Nov 6 05:47:35 EST 2018

Thanks Andre for the detailed response and HTTPD library steer - that’s new to me so I shall review with interest. :-)

I’m not in control of the pages, so that may be more useful than my first experiments - which were to download the page content into LC, add some markup and load the HTML text into the browser widget as a local ‘offline’ page.
Best,
Keith

> On 6 Nov 2018, at 10:38, Andre Alves Garzia via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> Keith,
> 
> If you're in control of the HTML used in the widget, then I'd advise you to build functions inside the HTML and just call them from LC instead of executing script directly, such as:
> 
> ---- in the html ----
> 
> <html>
> 
>  <head>
> 
>   ...
> 
>    <script>
> 
>    function paintItRed() {
> 
>      document.body.style.backgroundColor = "red";
> 
>    }
> 
>    </script>
> 
>  </head>
> 
>  <body>
> 
>  ...
> 
>  </body>
> 
> </html>
> 
> -------------------
> 
> 
> Then in the LC part you can do something like:
> 
> 
>   do "paintItRed()" in widget "Browser"
> 
> 
> Which is more readable. Also, the body of the function inside the HTML can be as complex as you want. Now, if you're not in control of the HTML, I'd opt for some out-of-the-box strategy where you have the LC HTTPD library serving the JS content and then use the LC "do .. in widget" form to add a new <script> tag with the "src" attribute pointing to the HTTPD library server, the script would load and execute in the context of the loaded page. This should only be done after the page is loaded though or your script risks executing before the HTML is complete.
> 
> Be aware that you can use the "do in widget" form with complex scripts, but I'd rather use the form above which keeps the JS and LC separate which is more of a personal preference than a technical reason to be honest.
> 
> om om
> 
> andre
> 
> On 11/6/2018 9:10 AM, Keith Clarke via use-livecode wrote:
>> Folks,
>> I’ve found a few examples of simple inline script injection to the browser widget, such as do "document.body.style.background = ‘red';" in widget "Browser”
>> 
>> Is it possible to inject a multi-line javascript function - with variables definition, loops, etc - in this fashion or would the function need to be injected into the page within the browser as markup and then called from a one-line script from LiveCode?
>> 
>> Thanks & regards,
>> Keith
>> _______________________________________________
>> use-livecode mailing list
>> use-livecode at lists.runrev.com
>> Please visit this url to subscribe, unsubscribe and manage your subscription preferences:
>> http://lists.runrev.com/mailman/listinfo/use-livecode
> 
> _______________________________________________
> use-livecode mailing list
> use-livecode at lists.runrev.com
> Please visit this url to subscribe, unsubscribe and manage your subscription preferences:
> http://lists.runrev.com/mailman/listinfo/use-livecode