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If i do jQuery(expr).change( function), then I can get an event function to fire when the user makes a change to the value.
Is it possible to get this to fire if it's changed programatically, ie if I call jQuery(expr).val("moo").
or if some Plain old JavaScript changes it's value?
Thanks for any help.
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The change event occurs when the value of an element has been changed (only works on <input>, <textarea> and <select> elements). The change () method triggers the change event, or attaches a function to run when a change event occurs. Note: For select menus, the change event occurs when an option is selected.
For text fields or text areas, the change event occurs when the field loses focus, after the content has been changed. Optional. Specifies the function to run when the change event occurs for the selected elements
How to Detect Change in a Text Input Box in jQuery. Answer: Use the input Event. You can bind the input event to an input text box using on() method to detect any change in it. The following example will display the entered value when you type something inside the input field. Example. $("#result").text($(this).val());
The change() method triggers the change event, or attaches a function to run when a change event occurs. Note: For select menus, the change event occurs when an option is selected. For text fields or text areas, the change event occurs when the field loses focus, after the content has been changed. Syntax.
After you've changed the value, you can fire the event yourself, and thus calling all the 'onchange' handlers.
jQuery('#element').change();
Changing the value directly in JS doesn't hook into anything which jQuery can listen for to trigger the change event. Like Sander says, you can fire the event handler yourself. If you don't have control over other code modifying these values and that isn't an option, you're kind of out of luck. The only other option which might work would be to have an observer watch the value on an interval using setTimeout, which is really messy and probably not a good idea.
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