Merge pull request #383 from oliverfoster/issue/359

fixes #359 IE11 Added Array.prototype.find and Object.assign polyfills

src/parser.js

@@ -82,7 +82,7 @@ class Parser {
   parseBrowser() {
     this.parsedResult.browser = {};
 
-    const browserDescriptor = browserParsersList.find((_browser) => {
+    const browserDescriptor = Utils.find(browserParsersList, (_browser) => {
       if (typeof _browser.test === 'function') {
         return _browser.test(this);
       }
@@ -165,7 +165,7 @@ class Parser {
   parseOS() {
     this.parsedResult.os = {};
 
-    const os = osParsersList.find((_os) => {
+    const os = Utils.find(osParsersList, (_os) => {
       if (typeof _os.test === 'function') {
         return _os.test(this);
       }
@@ -241,7 +241,7 @@ class Parser {
   parsePlatform() {
     this.parsedResult.platform = {};
 
-    const platform = platformParsersList.find((_platform) => {
+    const platform = Utils.find(platformParsersList, (_platform) => {
       if (typeof _platform.test === 'function') {
         return _platform.test(this);
       }
@@ -292,7 +292,7 @@ class Parser {
   parseEngine() {
     this.parsedResult.engine = {};
 
-    const engine = enginesParsersList.find((_engine) => {
+    const engine = Utils.find(enginesParsersList, (_engine) => {
       if (typeof _engine.test === 'function') {
         return _engine.test(this);
       }
@@ -328,7 +328,7 @@ class Parser {
    * @return {ParsedResult}
    */
   getResult() {
-    return Object.assign({}, this.parsedResult);
+    return Utils.assign({}, this.parsedResult);
   }
 
   /**
@@ -370,7 +370,7 @@ class Parser {
 
     if (platformsAndOSCounter > 0) {
       const platformsAndOSNames = Object.keys(platformsAndOSes);
-      const OSMatchingDefinition = platformsAndOSNames.find(name => (this.isOS(name)));
+      const OSMatchingDefinition = Utils.find(platformsAndOSNames, name => (this.isOS(name)));
 
       if (OSMatchingDefinition) {
         const osResult = this.satisfies(platformsAndOSes[OSMatchingDefinition]);
@@ -380,7 +380,10 @@ class Parser {
         }
       }
 
-      const platformMatchingDefinition = platformsAndOSNames.find(name => (this.isPlatform(name)));
+      const platformMatchingDefinition = Utils.find(
+        platformsAndOSNames,
+        name => (this.isPlatform(name)),
+      );
       if (platformMatchingDefinition) {
         const platformResult = this.satisfies(platformsAndOSes[platformMatchingDefinition]);
 
@@ -392,7 +395,7 @@ class Parser {
 
     if (browsersCounter > 0) {
       const browserNames = Object.keys(browsers);
-      const matchingDefinition = browserNames.find(name => (this.isBrowser(name, true)));
+      const matchingDefinition = Utils.find(browserNames, name => (this.isBrowser(name, true)));
 
       if (matchingDefinition !== void 0) {
         return this.compareVersion(browsers[matchingDefinition]);

src/utils.js

@@ -210,6 +210,8 @@ export default class Utils {
         return -1;
       }
     }
+
+    return undefined;
   }
 
   /**
@@ -231,6 +233,54 @@ export default class Utils {
     return result;
   }
 
+  /**
+   * Array::find polyfill
+   *
+   * @param  {Array} arr
+   * @param  {Function} predicate
+   * @return {Array}
+   */
+  static find(arr, predicate) {
+    let i;
+    let l;
+    if (Array.prototype.find) {
+      return Array.prototype.find.call(arr, predicate);
+    }
+    for (i = 0, l = arr.length; i < l; i += 1) {
+      const value = arr[i];
+      if (predicate(value, i)) {
+        return value;
+      }
+    }
+    return undefined;
+  }
+
+  /**
+   * Object::assign polyfill
+   *
+   * @param  {Object} obj
+   * @param  {Object} ...objs
+   * @return {Object}
+   */
+  static assign(obj, ...assigners) {
+    const result = obj;
+    let i;
+    let l;
+    if (Object.assign) {
+      return Object.assign(obj, ...assigners);
+    }
+    for (i = 0, l = assigners.length; i < l; i += 1) {
+      const assigner = assigners[i];
+      if (typeof assigner === 'object' && assigner !== null) {
+        const keys = Object.keys(assigner);
+        keys.forEach((key) => {
+          result[key] = assigner[key];
+        });
+      }
+    }
+    return obj;
+  }
+
   /**
    * Get short version/alias for a browser name
    *
@@ -250,10 +300,10 @@ export default class Utils {
    * @example
    *   getBrowserAlias('edge') // Microsoft Edge
    *
-   * @param  {string} browserName
+   * @param  {string} browserAlias
    * @return {string}
    */
-  static getBrowserTypeByAlias(browserAlia) {
-    return BROWSER_MAP[browserAlia] || '';
+  static getBrowserTypeByAlias(browserAlias) {
+    return BROWSER_MAP[browserAlias] || '';
   }
 }