Document.onbeforescriptexecute

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

Fired when the code in a <script> element declared in an HTML document is about to start executing. Does not fire if the element is added dynamically, eg with appendChild().

Syntax

document.onbeforescriptexecute = funcRef;

funcRef is a function reference, called when the event is fired. The event's target attribute is set to the script Element that is about to be executed.

Example

function starting(e) {
  logMessage("Starting script with ID: " + e.target.id);
}

document.addEventListener("beforescriptexecute", starting, true);

View Live Examples

Specifications

HTML5

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`onbeforescriptexecute`	No	No	9	No	No	No	No	No	9	No	No	No

Document.onbeforescriptexecute

Syntax

Example

Specifications

Browser compatibility

See also