stopImmediatePropagation

stopImmediatePropagation is a method on Event objects in web browsers. When invoked from an event listener, it immediately stops the event from continuing to propagate and also prevents any remaining listeners on the same target for that event from being called. In practice, after the call the event will not bubble up to ancestor elements, and other listeners registered on the current element for the same event type will not run.

This behavior differs from stopPropagation, which halts propagation to ancestor elements but may still allow other listeners on the same target to execute. stopImmediatePropagation combines both effects by stopping propagation and skipping the rest of the current target’s listeners for the event. It is therefore possible for some handlers to have run before the call, and for none of the remaining ones on the same target to run afterward.

Important to note is that stopImmediatePropagation does not by itself prevent the browser’s default action for the event. If the desired outcome includes stopping the default behavior (such as submitting a form), preventDefault must be called separately within the handler.

Usage considerations include the potential to disrupt other scripts or libraries that rely on event listeners on the same element. It is commonly used when a handler needs to take exclusive control over an event flow, but should be used sparingly due to possible side effects on multiple components listening for the same event.

Compatibility is broad across modern browsers; it is supported in Chrome, Firefox, Safari, Edge, and IE9 and later.