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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.
Summary
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);
Specification
See also
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