Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
Warning: Many methods used with createEvent, such as initCustomEvent, are deprecated. Use event constructors instead.
Creates an event of the type specified. The returned object should be first initialized and can then be passed to EventTarget.dispatchEvent.
type
A string that represents the type of event to be created. Possible event types include "UIEvents", "MouseEvents", "MutationEvents", and "HTMLEvents". See Notes section for details.
An Event object.
Examples// Create the event.
const event = document.createEvent("Event");
// Define that the event name is 'build'.
event.initEvent("build", true, true);
// Listen for the event.
elem.addEventListener(
"build",
(e) => {
// e.target matches elem
},
false,
);
// Target can be any Element or other EventTarget.
elem.dispatchEvent(event);
Event type strings suitable for passing to createEvent() are listed in the DOM standard â see the table in step 2. Bear in mind that most event objects now have constructors, which are the modern recommended way to create event object instances.
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