Trigger an event

Written byPhuoc Nguyen

Created

17 Feb, 2020

Last updated

24 Apr, 2020

#Trigger event for inputs

There are some special events that are avaialble as the method's element. You can call them directly such as following:

// For text box and textarea
ele.focus();
ele.blur();

// For form element
formEle.reset();
formEle.submit();

// For any element
ele.click();

#Trigger a native event

const trigger = function (ele, eventName) {
    const e = document.createEvent('HTMLEvents');
    e.initEvent(eventName, true, false);
    ele.dispatchEvent(e);
};

You can trigger the `change`, `keyup`, `mousedown` and more by calling

trigger(ele, 'mousedown');

#Trigger a custom event

The sample code below triggers a custom event named `hello` with a data of `{ message: 'Hello World' }`:

const e = document.createEvent('CustomEvent');
e.initCustomEvent('hello', true, true, { message: 'Hello World' });

// Trigger the event
ele.dispatchEvent(e);

#See also

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Phước Nguyễn