small refactoring + update tests

Author: jcubic

README.md

@@ -8,7 +8,7 @@
 [![npm](https://img.shields.io/badge/npm-DEV-blue.svg)](https://www.npmjs.com/package/jquery.terminal)
 ![bower](https://img.shields.io/badge/bower-DEV-yellow.svg)
 [![Build and test](https://github.com/jcubic/jquery.terminal/actions/workflows/build.yaml/badge.svg?branch=devel&event=push)](https://github.com/jcubic/jquery.terminal/actions/workflows/build.yaml)
-[![Coverage Status](https://coveralls.io/repos/github/jcubic/jquery.terminal/badge.svg?branch=devel&07c28c31dc260cd38636ca8bd296cfc4)](https://coveralls.io/github/jcubic/jquery.terminal?branch=devel)
+[![Coverage Status](https://coveralls.io/repos/github/jcubic/jquery.terminal/badge.svg?branch=devel&30173c7672fc43af7598ae2f8ea22778)](https://coveralls.io/github/jcubic/jquery.terminal?branch=devel)
 ![NPM Downloads](https://img.shields.io/npm/dm/jquery.terminal.svg?style=flat)
 [![jsDelivr Downloads](https://data.jsdelivr.com/v1/package/npm/jquery.terminal/badge?style=rounded&n=1)](https://www.jsdelivr.com/package/npm/jquery.terminal)
 [![Paid Support](https://img.shields.io/badge/paid-support-354465.svg)](https://support.jcubic.pl/)

__tests__/terminal.spec.js

@@ -1654,6 +1654,14 @@ describe('Terminal utils', function() {
             emitter.emit('test');
             expect(handler.mock.calls.length).toEqual(0);
         });
+        it('should not remove wrong event', () => {
+            var handler = jest.fn();
+            emitter.on('test', handler);
+            emitter.off('test_2');
+            emitter.emit('test');
+            emitter.emit('test');
+            expect(handler.mock.calls.length).toEqual(2);
+        });
         it('should add mutiple event handlers', () => {
             var foo = jest.fn();
             var bar = jest.fn();

js/jquery.terminal-src.js

@@ -260,7 +260,7 @@
         };
     }
     // -----------------------------------------------------------------------
-    // :: EventEmitter class
+    // :: EventEmitter class, created by ChatGPT (with small refactoring)
     // -----------------------------------------------------------------------
     function EventEmitter() {
         this._events = {};
@@ -283,9 +283,11 @@
     };
     // -----------------------------------------------------------------------
     EventEmitter.prototype.off = function(event, listener) {
+        if (!this._events[event]) return;
+
         if (!listener) {
             delete this._events[event];
-        } else if (this._events[event]) {
+        } else {
             this._events[event] = this._events[event].filter(function(l) {
                 return l !== listener;
             });

js/jquery.terminal.js

@@ -41,7 +41,7 @@
  *
  * broken image by Sophia Bai from the Noun Project (CC-BY)
  *
- * Date: Mon, 09 Dec 2024 15:38:00 +0000
+ * Date: Mon, 09 Dec 2024 20:12:39 +0000
  */
 /* global define, Map, BigInt */
 /* eslint-disable */
@@ -260,7 +260,7 @@
         };
     }
     // -----------------------------------------------------------------------
-    // :: EventEmitter class
+    // :: EventEmitter class, created by ChatGPT (with small refactoring)
     // -----------------------------------------------------------------------
     function EventEmitter() {
         this._events = {};
@@ -275,25 +275,27 @@
     // -----------------------------------------------------------------------
     EventEmitter.prototype.emit = function(event) {
         if (this._events[event]) {
-            const args = Array.prototype.slice.call(arguments, 1);
+            var args = Array.prototype.slice.call(arguments, 1);
             this._events[event].forEach(function(listener) {
                 listener.apply(null, args);
             });
         }
     };
     // -----------------------------------------------------------------------
     EventEmitter.prototype.off = function(event, listener) {
+        if (!this._events[event]) return;
+
         if (!listener) {
             delete this._events[event];
-        } else if (this._events[event]) {
+        } else {
             this._events[event] = this._events[event].filter(function(l) {
                 return l !== listener;
             });
         }
     };
     // -----------------------------------------------------------------------
     EventEmitter.prototype.once = function(event, listener) {
-        const self = this;
+        var self = this;
 
         function wrapper() {
             self.off(event, wrapper);
@@ -304,7 +306,7 @@
     };
     // -----------------------------------------------------------------------
     EventEmitter.prototype.wait_for = function(event) {
-        const deferred = new $.Deferred();
+        var deferred = new $.Deferred();
 
         this.once(event, function() {
             deferred.resolve();
@@ -5398,7 +5400,7 @@
     // -------------------------------------------------------------------------
     $.terminal = {
         version: 'DEV',
-        date: 'Mon, 09 Dec 2024 15:38:00 +0000',
+        date: 'Mon, 09 Dec 2024 20:12:39 +0000',
         // colors from https://www.w3.org/wiki/CSS/Properties/color/keywords
         color_names: [
             'transparent', 'currentcolor', 'black', 'silver', 'gray', 'white',