Element: beforescriptexecute event

{{APIRef("DOM")}} {{Non-standard_header}} {{deprecated_header}} 

[!WARNING] This event was a proposal in an early version of the specification. Do not rely on it.

The beforescriptexecute event is fired when a script is about to be executed. Cancelling the event prevents the script from executing.

It is a proprietary event specific to Gecko (Firefox).

Syntax

Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}} , or set an event handler property.

addEventListener("beforescriptexecute", (event) => { })

onbeforescriptexecute = (event) => { }

Event type

A generic {{domxref("Event")}} .

Specifications

Not part of any specification.

Browser compatibility

{{Compat}} 

See also

• afterscriptexecute event