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I'm trying to trigger the change event on a text box when I change its value with a button, but it doesn't work. Check this fiddle.
If you type something in the text boxes and click somewhere else, change is triggered. However, if you click the button, the text box value is changed, but change doesn't trigger. Why?
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When you dynamically set a value in a textfield using jQuery . val(), you have to manually trigger the . change event if you want to add extra code that trigger when the value of the field change.
val() method is primarily used to get the values of form elements such as input , select and textarea . When called on an empty collection, it returns undefined .
jQuery trigger() Method The trigger() method triggers the specified event and the default behavior of an event (like form submission) for the selected elements. This method is similar to the triggerHandler() method, except that triggerHandler() does not trigger the default behavior of the event.
$(document). ready(function(){ $('#countrylist'). change(function(e){ // Your event handler }); // And now fire change event when the DOM is ready $('#countrylist'). trigger('change'); });
onchange only fires when the user types into the input and then the input loses focus.
You can manually call the onchange event using after setting the value:
$("#mytext").val( 777 ).change(); // someObject.onchange(); in standard JS Alternatively, you can trigger the event using:
$("#mytext").val( 777 ).trigger("change"); From redsquare's excellent suggestion, this works nicely:
$.fn.changeVal = function (v) { return this.val(v).trigger("change"); } $("#my-input").changeVal("Tyrannosaurus Rex"); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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