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GlobalEventHandlers.onblur

The onblur property indicates the object's event handler for the blur event. It's available on Element, Document, and Window.

Syntax

element.onblur = function;

function is the name of a user-defined function, without the () suffix or any parameters, or an anonymous function declaration, such as

element.onblur = function() { console.log("onblur event detected!"); };

Example

<html>

<head>
<title>onblur event example</title>

<script type="text/javascript">

var elem = null;

function initElement()
{
  elem = document.getElementById("foo");
  // NOTE: doEvent(); or doEvent(param); will NOT work here.
  // Must be a reference to a function name, not a function call.
  elem.onblur = doEvent;
};

function doEvent()
{
  elem.value = 'Bye-Bye';
  console.log("onblur Event detected!")
}
</script>

<style type="text/css">
<!--
#foo {
border: solid blue 2px;
}
-->
</style>
</head>

<body onload="initElement();">
<form>
<input type="text" id="foo" value="Hello!" />
</form>

<p>Click on the above element to give it focus, then click outside the
element.<br /> Reload the page from the NavBar.</p>

</body>
</html>

Notes

The blur event is raised when an element loses focus.

In contrast to MSIE--in which almost all kinds of elements receive the blur event--almost all kinds of elements on Gecko browsers do NOT work with this event.

Specifications

Specification	Status	Comment
HTML Living Standard The definition of 'onblur' in that specification.	Living Standard

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	Yes	Yes	Yes	Yes	Yes	Yes

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes	Yes	Yes	Yes	Yes	Yes	Yes

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onblur