adds isWebWorker

is-web-worker/is-web-worker-test.js

@@ -0,0 +1,10 @@
+'use strict';
+
+var QUnit = require('../../test-wrapper');
+var isWebWorker = require('./is-web-worker');
+
+QUnit.module("can-globals/is-web-worker/is-web-worker");
+
+QUnit.test("basics", function(){
+	equal(typeof isWebWorker(), "boolean");
+});

is-web-worker/is-web-worker.js

@@ -0,0 +1,35 @@
+'use strict';
+
+var globals = require('can-globals/can-globals-instance');
+
+/* globals WorkerGlobalScope */
+// A bit of weirdness to avoid complaining linters
+var funcConstructor = Function;
+
+
+/**
+ * @module {function} can-globals/is-browser-window/is-web-worker is-web-worker
+ * @parent can-globals/modules
+ * @signature `isWebWorker()`
+ *
+ * Returns `true` if the code is running within a [web worker](https://developer.mozilla.org/en-US/docs/Web/API/Worker).
+ *
+ * ```js
+ * var isWebWorker = require("can-globals/is-web-worker/is-web-worker");
+ * var GLOBAL = require("can-globals/global/global");
+ *
+ * if(isWebWorker()) {
+ *   ...
+ * }
+ * ```
+ *
+ * @return {Boolean} True if the environment is a web worker.
+ */
+
+globals.define('isWebWorker', function(){
+    var global = funcConstructor('return this')();
+    return typeof WorkerGlobalScope !== "undefined" &&
+        (global instanceof WorkerGlobalScope);
+});
+
+module.exports = globals.makeExport('isWebWorker');

test.js

@@ -3,4 +3,5 @@ require('./can-globals-test');
 require('./global/global-test');
 require('./location/location-test');
 require('./is-browser-window/is-browser-window-test');
+require('./is-web-worker/is-web-worker-test');
 require('./is-node/is-node-test');