lib: make event static properties non writable and configurable

The idl definition for Event makes the properties constant this means that they shouldn't be configurable and writable. However, they were, and this commit fixes that. Fixes: #50417 PR-URL: #50425 Reviewed-By: Vinícius Lourenço Claro Cardoso <[email protected]> Reviewed-By: Matthew Aitken <[email protected]>

Author: BenzeneAlcohol

lib/internal/event_target.js

@@ -2,6 +2,7 @@
 
 const{
  ArrayFrom,
+ ArrayPrototypeReduce,
  Boolean,
  Error,
  FunctionPrototypeCall,
@@ -318,11 +319,6 @@ class Event{
 thrownewERR_INVALID_THIS('Event');
 this.#propagationStopped =true;
 }
-
-staticNONE=0;
-staticCAPTURING_PHASE=1;
-staticAT_TARGET=2;
-staticBUBBLING_PHASE=3;
 }
 
 ObjectDefineProperties(
@@ -358,6 +354,22 @@ ObjectDefineProperties(
 isTrusted: isTrustedDescriptor,
 });
 
+conststaticProps=['NONE','CAPTURING_PHASE','AT_TARGET','BUBBLING_PHASE'];
+
+ObjectDefineProperties(
+Event,
+ArrayPrototypeReduce(staticProps,(result,staticProp,index=0)=>{
+result[staticProp]={
+__proto__: null,
+writable: false,
+configurable: false,
+enumerable: true,
+value: index,
+};
+returnresult;
+},{}),
+);
+
 functionisCustomEvent(value){
 returnisEvent(value)&&(value?.[kDetail]!==undefined);
 }

test/parallel/test-event-target.js

@@ -0,0 +1,21 @@
+'use strict';
+
+require('../common');
+constassert=require('assert');
+
+consteventPhases={
+'NONE': 0,
+'CAPTURING_PHASE': 1,
+'AT_TARGET': 2,
+'BUBBLING_PHASE': 3
+};
+
+for(const[prop,value]ofObject.entries(eventPhases)){
+// Check if the value of the property matches the expected value
+assert.strictEqual(Event[prop],value,`Expected Event.${prop} to be ${value}, but got ${Event[prop]}`);
+
+constdesc=Object.getOwnPropertyDescriptor(Event,prop);
+assert.strictEqual(desc.writable,false,`${prop} should not be writable`);
+assert.strictEqual(desc.configurable,false,`${prop} should not be configurable`);
+assert.strictEqual(desc.enumerable,true,`${prop} should be enumerable`);
+}