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The onblur property returns the onBlur event handler code, if any, that exists on the current element.

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
WHATWG HTML Living Standard
The definition of 'onblur' in that specification.
Living Standard  

Document Tags and Contributors

 Last updated by: cvrebert,