@stoplight/lifecycle - npm Package Compare versions

Comparing version 2.3.1 to 2.3.2

emitter/emitter.d.ts

@@ -18,3 +18,4 @@ import { IDisposable } from '../disposable';
 export declare class EventEmitter<E extends EventMap> implements IEventEmitter<E> {
-    private _emitter;
+    private readonly _emitter;
+    private readonly _registeredListeners;
     on<P extends keyof E>(type: P, listener: E[P]): IDisposable;
@@ -21,0 +22,0 @@ emit<P extends keyof E>(type: P, ...args: Parameters<E[P]>): void;

emitter/emitter.js

@@ -8,4 +8,13 @@ "use strict";
         this._emitter = new Emitter();
+        this._registeredListeners = new Map();
     }
     on(type, listener) {
+        let registeredListeners = this._registeredListeners.get(type);
+        if (registeredListeners === void 0) {
+            registeredListeners = new WeakSet();
+            this._registeredListeners.set(type, registeredListeners);
+        }
+        else if (registeredListeners.has(listener)) {
+            throw new Error(`Double-registered for '${type}' event.`);
+        }
         const wrappedListener = (...args) => {
@@ -19,4 +28,7 @@ try {
         };
+        registeredListeners.add(listener);
         this._emitter.on(String(type), wrappedListener);
         return disposable_1.createDisposable(() => {
+            var _a;
+            (_a = registeredListeners) === null || _a === void 0 ? void 0 : _a.delete(listener);
             this._emitter.off(String(type), wrappedListener);
@@ -41,2 +53,3 @@ });
     dispose() {
+        this._registeredListeners.clear();
         this._emitter.removeAllListeners();
@@ -43,0 +56,0 @@ }

package.json

 {
   "name": "@stoplight/lifecycle",
-  "version": "2.3.1",
+  "version": "2.3.2",
   "description": "Event and disposable helpers.",
@@ -5,0 +5,0 @@ "keywords": [],

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Found 1 instance in 1 package

Fixed alerts

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Improved metrics

Total package byte prevSize

37818

increased by3.21%

Lines of code

428

increased by3.38%

No dependency changes