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‎doc/api/events.md‎
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‎doc/api/events.md‎
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‎lib/internal/event_target.js‎
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‎lib/internal/event_target.js‎
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@@ -2111,8 +2111,11 @@ Sets the `defaultPrevented` property to `true` if `cancelable` is `true`.
 added: v14.5.0
 -->
 
+> Stability: 3 - Legacy: Use [`event.defaultPrevented`][] instead.
+
 * Type: {boolean} True if the event has not been canceled.
 
+The value of `event.returnValue` is always the opposite of `event.defaultPrevented`.
 This is not used in Node.js and is provided purely for completeness.
 
 #### `event.srcElement`
@@ -2433,6 +2436,7 @@ to the `EventTarget`.
 [`emitter.listenerCount()`]: #emitterlistenercounteventname
 [`emitter.removeListener()`]: #emitterremovelistenereventname-listener
 [`emitter.setMaxListeners(n)`]: #emittersetmaxlistenersn
+[`event.defaultPrevented`]: #eventdefaultprevented
 [`event.stopPropagation()`]: #eventstoppropagation
 [`event.target`]: #eventtarget
 [`events.defaultMaxListeners`]: #eventsdefaultmaxlisteners
 
@@ -236,7 +236,7 @@ class Event {
   get returnValue() {
     if (!isEvent(this))
       throw new ERR_INVALID_THIS('Event');
-    return !this.defaultPrevented;
+    return !this.#cancelable || !this.#defaultPrevented;
   }
 
   /**
Original file line number	Diff line number	Diff line change
`@@ -236,7 +236,7 @@ class Event {`
`236`	`236`	`get returnValue() {`
`237`	`237`	`if (!isEvent(this))`
`238`	`238`	`throw new ERR_INVALID_THIS('Event');`
`239`		`- return !this.defaultPrevented;`
	`239`	`+ return !this.#cancelable \|\| !this.#defaultPrevented;`
`240`	`240`	`}`
`241`	`241`
`242`	`242`	`/**`