GlobalEventHandlers.onblur - Web APIs 编辑

The onblur property of the GlobalEventHandlers mixin is the EventHandler for processing blur events. It's available on Element, Document, and Window.

The blur event is raised when an element loses focus.

Note: The opposite of onblur is onfocus.

Syntax

target.onblur = functionRef;

Value

functionRef is a function name or a function expression. The function receives a FocusEvent object as its sole argument.

Example

This example uses onblur and onfocus to change the text within an <input> element.

HTML

<input type="text" value="CLICK HERE">

JavaScript

let input = document.querySelector('input');

input.onblur = inputBlur;
input.onfocus = inputFocus;

function inputBlur() {
  input.value = 'Focus has been lost';
}

function inputFocus() {
  input.value = 'Focus is here';
}

Result

Try clicking in and out of the form field, and watch its contents change accordingly.

Specifications

Browser compatibility

BCD tables only load in the browser

In contrast to IE, in which almost all kinds of elements receive the blur event, only a few kinds of elements on Gecko browsers work with this event.

See also

• blur event
• Related event handler: GlobalEventHandlers.onfocus