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How do I add an onchange event here?
Framework: rails
Database: MySQL
I am populating the options from the database and that made me use options_from_collection_for_select
select_tag(:variable,options_from_collection_for_select(:all, :id, :name))
664
The other difference is that the onchange event also works on <select> elements.
Definition and Usage The onchange attribute fires the moment when the value of the element is changed. Tip: This event is similar to the oninput event. The difference is that the oninput event occurs immediately after the value of an element has changed, while onchange occurs when the element loses focus.
onchange is not fired when the value of an input is changed. It is only changed when the input's value is changed and then the input is blurred. What you'll need to do is capture the keypress event when fired in the given input. Then you'll test the value of the input against the value before it was keypressed.
An onChange event handler returns a Synthetic Event object which contains useful meta data such as the target input's id, name, and current value. We can access the target input's value inside of the handleChange by accessing e. target.
select_tag takes an options hash as its final parameter, in which you can add any HTML attributes for the select. So to add an onchange attribute:
select_tag :variable, options_from_collection_for_select(:all, :id, :name), onchange: 'yourOnChangeHandler()'
try something like:
:onchange => remote_function(:url => {:controller => 'controller', :action => 'action'})
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