JavaScript onerror Event
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JavaScript onerror Event
The onerror event occurs when a resource failed to load, or can't be used.
For example: This event occurs when a requested image is not found.
onerror Event as Attribute
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<img src="no-image.jpg" onerror="myFunction()">
<script>
function myFunction(){
alert("Image not Found");
}
</script>
</body>
</html>
Syntax
As Attribute
<element onerror = "JavaScript">
As Property
object.onerror = function(){
// code
};
Using Event Listener
object.addEventListener("error" , myScript);
onerror Event as Property
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<img src="no-image.jpg">
<script>
var x = document.getElementsByTagName("img")[0];
function myFunction(){
alert("Image not Found");
}
x.onerror = myFunction;
</script>
</body>
</html>
Using addEventListener() Method
Note: The addEventListener() method is not supported in Internet Explorer 8 and below.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<img src="no-image.jpg">
<script>
var x = document.getElementsByTagName("img")[0];
function myFunction(){
alert("Image not Found");
}
x.addEventListener("error", myFunction);
</script>
</body>
</html>
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