Added fallback for unsupported SharedWorker. Relates to #2

Wildhoney · Mar 2, 2017 · 671c85d · 671c85d
1 parent 1709e60
commit 671c85d
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Showing 3 changed files with 101 additions and 31 deletions.
diff --git a/dist/freelancer.js b/dist/freelancer.js
@@ -1,4 +1,4 @@
-module.exports =
+var F =
 /******/ (function(modules) { // webpackBootstrap
 /******/ 	// The module cache
 /******/ 	var installedModules = {};
@@ -75,7 +75,7 @@ module.exports =
 
 
 Object.defineProperty(exports, "__esModule", {
-    value: true
+  value: true
 });
 /**
  * @method createUrl
@@ -85,54 +85,88 @@ Object.defineProperty(exports, "__esModule", {
  */
 const createUrl = (fn, ...options) => {
 
-    if (typeof fn !== 'function') {
+  if (typeof fn !== 'function') {
 
-        // Ensure the passed parameter is actually a function.
-        throw new Error('Freelancer: Passed parameter must be a function.');
-    }
+    // Ensure the passed parameter is actually a function.
+    throw new Error('Freelancer: Passed parameter must be a function.');
+  }
 
-    // Map each of the passed options through the JSON stringify process.
-    const params = options.map(option => JSON.stringify(option));
+  // Map each of the passed options through the JSON stringify process.
+  const params = options.map(JSON.stringify);
 
-    // Transform the passed function into an IIFE and then create a blob.
-    const blob = new Blob([`(${fn.toString()})(${params})`], { type: 'application/javascript' });
+  // Transform the passed function into an IIFE and then create a blob.
+  const blob = new Blob([`(${fn.toString()})(${params})`], { type: 'application/javascript' });
 
-    // Create a URL from the aforementioned blob that handles the worker logic.
-    return URL.createObjectURL(blob);
+  // Create a URL from the aforementioned blob that handles the worker logic.
+  return URL.createObjectURL(blob);
 };
 
 /**
- * @class Freelancer
- * @extends Worker
+ * @method createFallback
+ * @param {String} name
+ * @return {Object}
  */
-class Freelancer extends Worker {
+const createFallback = name => {
+
+  return class {
 
     /**
      * @constructor
-     * @param {Array} args
-     * @return {Worker}
+     * @return {NullWorker}
      */
-    constructor(...args) {
-        return super(createUrl(...args));
+    constructor() {
+
+      // Raise an error when a worker isn't supported.
+      throw new Error(`Freelancer: Unfortunately ${name} is not supported by the current browser.`);
     }
 
+  };
+};
+
+/**
+ * @constant WorkerExtend
+ * @type {Worker|NullWorker}
+ */
+const WorkerExtend = window.Worker || createFallback('Worker');
+
+/**
+ * @constant SharedWorkerExtend
+ * @type {Worker|NullWorker}
+ */
+const SharedWorkerExtend = window.SharedWorker || createFallback('SharedWorker');
+
+/**
+ * @class Freelancer
+ * @extends Worker
+ */
+class Freelancer extends WorkerExtend {
+
+  /**
+   * @constructor
+   * @param {Array} args
+   * @return {Worker}
+   */
+  constructor(...args) {
+    return super(createUrl(...args));
+  }
+
 }
 
 exports.Freelancer = Freelancer; /**
                                   * @class SharedFreelancer
                                   * @extends SharedWorker
                                   */
 
-class SharedFreelancer extends SharedWorker {
+class SharedFreelancer extends SharedWorkerExtend {
 
-    /**
-     * @constructor
-     * @param {Array} args
-     * @return {Worker}
-     */
-    constructor(...args) {
-        return super(createUrl(...args));
-    }
+  /**
+   * @constructor
+   * @param {Array} args
+   * @return {Worker}
+   */
+  constructor(...args) {
+    return super(createUrl(...args));
+  }
 
 }
 

diff --git a/package.json b/package.json
@@ -73,4 +73,4 @@
       "no-duplicate-imports": "off"
     }
   }
-}
+}
diff --git a/src/freelancer.js b/src/freelancer.js
@@ -24,11 +24,47 @@ const createUrl = (fn, ...options) => {
 
 };
 
+/**
+ * @method createFallback
+ * @param {String} name
+ * @return {Object}
+ */
+const createFallback = name => {
+
+    return class {
+
+        /**
+         * @constructor
+         * @return {Object}
+         */
+        constructor() {
+
+            // Raise an error when a worker isn't supported.
+            throw new Error(`Freelancer: Unfortunately the ${name} is not supported by the current browser.`);
+
+        }
+
+    }
+
+};
+
+/**
+ * @constant WorkerExtend
+ * @type {Worker|Object}
+ */
+const WorkerExtend = window.Worker || createFallback('Worker');
+
+/**
+ * @constant SharedWorkerExtend
+ * @type {Worker|Object}
+ */
+const SharedWorkerExtend = window.SharedWorker || createFallback('SharedWorker');
+
 /**
  * @class Freelancer
  * @extends Worker
  */
-export class Freelancer extends Worker {
+export class Freelancer extends WorkerExtend {
 
     /**
      * @constructor
@@ -45,7 +81,7 @@ export class Freelancer extends Worker {
  * @class SharedFreelancer
  * @extends SharedWorker
  */
-export class SharedFreelancer extends SharedWorker {
+export class SharedFreelancer extends SharedWorkerExtend {
 
     /**
      * @constructor