On Dec 30, 2011, at 12:37 PM, Craig White wrote:
>
> On Dec 30, 2011, at 9:58 AM, Walter Lee Davis wrote:
>
>>
>> On Dec 30, 2011, at 11:32 AM, Craig White wrote:
>>
>>> Previous versions of Rails, I could just...
>>>
>>> (app/helpers/application_helper.rb)
>>> def set_focus_to_id(id)
>>> javascript_tag("$('#{id}').focus()");
>>> end
>>>
>>> then in any view, do something like
>>> <%= set_focus_to_id 'user_uid' %>
>>>
>>> but this doesn't work in Rails 3.1.x
>>>
>>> What is the new preferred method for doing this?
>>
>> View source (in a browser) and see if you have the prototype.js library
>> loaded. focus() is a Prototype method (unless I'm wrong and it's in jQuery
>> as well) and without the library it won't work.
>>
>> 3.1 switched to jQuery, which annoys me, but there is a gem you can add to
>> put things right again.
>>
>> One other thing to look at -- is your call to set_focus_to_id appearing (in
>> source) below the element it refers to? If it isn't, then you have to wrap
>> your call in an observer callback, so that you are sure that the DOM is
>> ready and knows about the element you're trying to modify.
>>
>> If your code is at the bottom of your view, then you should be fine, but if
>> it's above the referenced element, or if it's in a content_for :head block,
>> then you have to do something like this:
>>
>> #prototype-flavored javascript
>> document.observe('dom:loaded', function(){
>> //your code here
>> });
> ----
> duh... prototype - I don't think it's useful to load both prototype and
> jquery as I'm already using a bunch of query.
>
> I'll see if I can figure out how to change that to a jquery friendly method.
$(document).ready(function() {
$('#yourElement').focus();
});
It's just a matter of making it a CSS selector, rather than an ID selector. In
Prototype, you would use the $$() method with a CSS selector, and that method
always returns an array, so you would have to write it as
$$('#yourElement').invoke('focus');. jQuery returns either a single element or
an array, which is one of the many ways it is icky.
Walter
>
> Thanks
>
> Craig
>
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