JavaScript onbeforeprint Event
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JavaScript onbeforeprint Event
The onbeforeprint event occurs when a page is about to be printed, or previewed for printing.
onbeforeprint Event as Attribute
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body onbeforeprint="myFunction()">
<script>
function myFunction() {
alert("You are about to print this document!");
}
</script>
</body>
</html>
Syntax
As Attribute
<element onbeforeprint = "JavaScript">
As Property
window.onbeforeprint = function(){
// code
};
Using Event Listener
window.addEventListener("beforeprint" , myScript);
onbeforeprint Event as Property
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
function myFunction() {
alert("You are about to print this document!");
}
window.onbeforeprint = 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>
<script>
function myFunction() {
alert("You are about to print this document!");
}
window.addEventListener("beforeprint", myFunction);
</script>
</body>
</html>
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