Re: [Rails] Refresh a div without reloading the page

On Jun 13, 2013, at 6:03 PM, Robert Walker wrote:

> Walter Davis wrote in post #1111896:
>> The simple answer is "with JavaScript".
>>
>> If you are filling that DIV with the result of a normal RESTful route,
>> like /widgets/2 (show) then you can do something like this:
>>
>> $('widget_id_picker_dom_id').observe('change', function(evt){
>> new Ajax.Updater('div_to_update', '/widgets/' + $F(this), { method:
>> 'get });
>> });
>>
>> That's Prototype.js code, I am sure there is something similar in
>> jQuery.
>
> The jQuery
> -----------------
>
> $(function() {
> $('#widget_id_picker_dom_id').change(function() {
> # Non-AJAX update (no server request)
> $('#div_to_update').html("html content here...");
>
> # AJAX update
> $('#div_to_update').load("/url/to/retrieve/div/contents", function()
> {
> # Optional completion handler called after loading the div
> contents
> });
> });
> });

Thanks for pitching in with this. Can you show the proper way in jQuery to get the current value of the picker you're observing, as I did with $F(this) above? That's usually the critical thing with this design pattern -- you change the picker and you get unique content based on whatever value you changed it to.

Walter

>
> Note: This is wrapped inside $(function() {}); which watches for the DOM
> ready event before binding to the control widget change event. We use
> Unobtrusive JavaScript these days rather than the old-style DOM event
> attributes.
>
> <select .... onchange="myFunction();"></select> # This is obtrusive
> (i.e. inline) and doesn't belong in HTML. Separate your page structure
> from behavior.
>
> http://en.wikipedia.org/wiki/Unobtrusive_JavaScript
>
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