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

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

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Document/onbeforescriptexecute