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Mathias Wittlock

2007-Feb-12 12:15 UTC

Quick RJS question.

I got a short question about RJS.

Is it possible to get the RJS to "compile" to Javascript code without
having to use AJAX? As in, can I use RJS to bundle some javascript
code with my page when it''s first created?

Thanks,
Mathias Wittlock.

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Thorsten L

2007-Feb-12 12:26 UTC

head link

Re: Quick RJS question.

You can use all the helpers you use in a RJS template in a vie as
well, you just dont need the page obejct.
you can also use the JavaScript Helpers to create script tags, links
with function calls etc.for this.

link_to_function "hide menu", visual_effect(:fade, "menu")

On 12 Feb., 13:15, "Mathias Wittlock" <wittlock
+rubyonrailsl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> I got a short question about RJS.
>
> Is it possible to get the RJS to "compile" to Javascript code
without
> having to use AJAX? As in, can I use RJS to bundle some javascript
> code with my page when it''s first created?
>
> Thanks,
> Mathias Wittlock.

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Mathias Wittlock

2007-Feb-12 13:54 UTC

head link

Re: Quick RJS question.

On 2/12/07, Thorsten L <duplexxx-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
wrote:>
> You can use all the helpers you use in a RJS template in a vie as
> well, you just dont need the page obejct.
> you can also use the JavaScript Helpers to create script tags, links
> with function calls etc.for this.
>
> link_to_function "hide menu", visual_effect(:fade,
"menu")
Hmm, this pointed me in the right direction to get what I wanted.
Thanks a bunch, much appreciated! :)

Mathias.

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Chad Fowler

2007-Feb-12 14:39 UTC

head link

Re: Quick RJS question.

On 2/12/07, Mathias Wittlock
<wittlock+rubyonrailslist-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
> I got a short question about RJS.
>
> Is it possible to get the RJS to "compile" to Javascript code
without
> having to use AJAX? As in, can I use RJS to bundle some javascript
> code with my page when it''s first created?
>

Thorsten gave you one answer---probably the one you wanted.  Another
answer is simply "yes".   You can use te JavaScriptGenerator which RJS
invokes in any view context (or instantiate it manually if you want to
go through those pains).  Here''s what it looks like:

update_page do |page|
  page[''an-element''].visual_effect :shake
end

This block will actually return the generated Javascript.  So, for
example, if you wanted to do  your own special link_to_shake helper,
you could do something like this (untested):

def link_to_shake(element_id)
  link_to_function "Shake it", update_page do |page|
    page[element_id].visual_effect :shake
  end
end

Chad

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igotimac-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

2007-Feb-12 15:03 UTC

head link

Re: Quick RJS question.

This could be usefull in debugging RJS output for those of us that
have no clue about RJS and want to see the javascript it''s
generating...

If I were writting normal javascript I would do:

$(''attribute[<%=index%>][id_to_me]'').value =
"";
$(''filename- <%=index%>'').value = "";

but I want to return javascript as an Ajax response so I''m doing:

page.select("#attribute[#{index}][id_to_me]").value = "";
page.select("#filename-#{index}").value = "";

And it''s not working, and I''m not really sure how to debug it.

On Feb 12, 9:39 am, "Chad Fowler"
<c...-Vm8wfZGX7qC+XT7JhA+gdA@public.gmane.org>
wrote:> On 2/12/07, Mathias Wittlock
<wittlock+rubyonrailsl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
> > I got a short question about RJS.
>
> > Is it possible to get the RJS to "compile" to Javascript
code without
> > having to use AJAX? As in, can I use RJS to bundle some javascript
> > code with my page when it''s first created?
>
> Thorsten gave you one answer---probably the one you wanted.  Another
> answer is simply "yes".   You can use te JavaScriptGenerator
which RJS
> invokes in any view context (or instantiate it manually if you want to
> go through those pains).  Here''s what it looks like:
>
> update_page do |page|
>   page[''an-element''].visual_effect :shake
> end
>
> This block will actually return the generated Javascript.  So, for
> example, if you wanted to do  your own special link_to_shake helper,
> you could do something like this (untested):
>
> def link_to_shake(element_id)
>   link_to_function "Shake it", update_page do |page|
>     page[element_id].visual_effect :shake
>   end
> end
>
> Chad

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Thorsten L

2007-Feb-12 15:06 UTC

head link

Re: Quick RJS question.

> page.select("#attribute[#{index}][id_to_me]").value =
"";
> page.select("#filename-#{index}").value = "";
you don''t use the # at the start of the id''s name in RJS,
simply
because it''s not used in Prototype Javascript as well.

page.select("attribute[#{index}][id_to_me]").value = "";
page.select("filename-#{index}").value = "";


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Chad Fowler

2007-Feb-12 15:09 UTC

head link

Re: Quick RJS question.

On 2/12/07, igotimac-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<igotimac-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
> This could be usefull in debugging RJS output for those of us that
> have no clue about RJS and want to see the javascript it''s
> generating...
>
> If I were writting normal javascript I would do:
>
> $(''attribute[<%=index%>][id_to_me]'').value =
"";
> $(''filename- <%=index%>'').value = "";
>
> but I want to return javascript as an Ajax response so I''m doing:
>
> page.select("#attribute[#{index}][id_to_me]").value =
"";
> page.select("#filename-#{index}").value = "";
>
> And it''s not working, and I''m not really sure how to
debug it.
>
The best way is to use FireFox with FireBug.  You can inspect the
response of an XMLHTTPRequest and see the generated Javascript.  Very
handy.

Chad

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Rails - Feb 2007 - Quick RJS question.

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