The blur event fires when an element has lost focus.
The opposite of blur is focus.
This event is not cancelable and does not bubble.
The blur event fires when an element has lost focus.
The opposite of blur is focus.
This event is not cancelable and does not bubble.
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener("blur", (event) => {});
onblur = (event) => {};
A Event.
This interface also inherits properties from its parent Event.
An EventTarget representing a secondary target for this event. In some cases (such as when tabbing in or out a page), this property may be set to null for security reasons.
This example changes the appearance of a document when it loses focus. It uses focus and blur events.
<p id="log">Click on this document to give it focus.</p>
.paused {
background: #ddd;
color: #555;
}
function pause() {
document.body.classList.add("paused");
log.textContent = "FOCUS LOST!";
}
function play() {
document.body.classList.remove("paused");
log.textContent =
"This document has focus. Click outside the document to lose focus.";
}
const log = document.getElementById("log");
window.addEventListener("blur", pause);
window.addEventListener("focus", play);