Document: beforescriptexecute event
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.
The beforescriptexecute
event fires when a static <script>
is about to start executing. It does not fire if the element is added dynamically, such as with appendChild()
.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
js
addEventListener("beforescriptexecute", (event) => {});
onbeforescriptexecute = (event) => {};
Event type
A generic Event
.
Examples
js
function starting(e) {
logMessage(`Starting script with ID: ${e.target.id}`);
}
document.addEventListener("beforescriptexecute", starting, true);
// or
document.onbeforescriptexecute = starting;
Specifications
Not part of any specification.
Browser compatibility
BCD tables only load in the browser
See also
afterscriptexecute
event ofDocument
Document.currentScript