feat: allowDuplicateHandlers

added options to allow duplicated handler
simonecorsi · Dec 17, 2021 · f0c71cb · f0c71cb
1 parent 9dfeede
commit f0c71cb
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/index.d.ts b/index.d.ts
@@ -13,6 +13,7 @@ type FineOptions = {
     timeout: number;
     events: ProcessEvents;
     unref: boolean;
+    allowDuplicateHandlers: boolean;
 };
 /**
  * @param {number} timeout

diff --git a/index.js b/index.js
@@ -21,11 +21,13 @@ const DEFAULT_EVENTS = [
  * @prop {number} timeout
  * @prop {ProcessEvents} events
  * @prop {boolean} unref
+ * @prop {boolean} allowDuplicateHandlers
  */
 const DEFAULT_OPTS = {
   timeout: 2000,
   events: DEFAULT_EVENTS,
   unref: false,
+  allowDuplicateHandlers: true,
 };
 
 /**
@@ -65,9 +67,10 @@ function fine(callbacks = [], opts = {}) {
   validateParameters(options.timeout, options.events, callbacks);
 
   for (const event of options.events) {
-    if (process.listenerCount(event) > 0) {
+    if (!options.allowDuplicateHandlers && process.listenerCount(event) > 0) {
       throw new Error(`A ${event} handler is already registered`);
     }
+
     process.once(event, () => {
       const code = event.match("^SIG") ? 0 : 1;