gaspersic/freeCodeCamp
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

fix: correct inconsistency in formatting (#34721)

Browse Source 
* fix: correct inconsistency in formatting

* fix: remove space before parentheses
This commit is contained in:
lasjorg
2019-03-12 21:49:54 +01:00
committed by Randell Dawson
parent 4231d9e112
commit 494687f75e
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-an-iife-to-create-a-module.english.md
View File

@ -9,7 +9,7 @@ challengeType: 1
An <code>immediately invoked function expression</code> (<code>IIFE</code>) is often used to group related functionality into a single object or <code>module</code>. For example, an earlier challenge defined two mixins:
<blockquote>function glideMixin(obj) {<br>&nbsp;&nbsp;obj.glide = function() {<br>&nbsp;&nbsp;&nbsp;&nbsp;console.log("Gliding on the water");<br>&nbsp;&nbsp;};<br>}<br>function flyMixin(obj) {<br>&nbsp;&nbsp;obj.fly = function() {<br>&nbsp;&nbsp;&nbsp;&nbsp;console.log("Flying, wooosh!");<br>&nbsp;&nbsp;};<br>}</blockquote>
We can group these <code>mixins</code> into a module as follows:
<blockquote>let motionModule = (function () {<br>&nbsp;&nbsp;return {<br>&nbsp;&nbsp;&nbsp;&nbsp;glideMixin: function (obj) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;obj.glide = function() {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log("Gliding on the water");<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;};<br>&nbsp;&nbsp;&nbsp;&nbsp;},<br>&nbsp;&nbsp;&nbsp;&nbsp;flyMixin: function(obj) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;obj.fly = function() {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log("Flying, wooosh!");<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;};<br>&nbsp;&nbsp;&nbsp;&nbsp;}<br>&nbsp;&nbsp;}<br>}) (); // The two parentheses cause the function to be immediately invoked</blockquote>
<blockquote>let motionModule = (function () {<br>&nbsp;&nbsp;return {<br>&nbsp;&nbsp;&nbsp;&nbsp;glideMixin: function(obj) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;obj.glide = function() {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log("Gliding on the water");<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;};<br>&nbsp;&nbsp;&nbsp;&nbsp;},<br>&nbsp;&nbsp;&nbsp;&nbsp;flyMixin: function(obj) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;obj.fly = function() {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;console.log("Flying, wooosh!");<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;};<br>&nbsp;&nbsp;&nbsp;&nbsp;}<br>&nbsp;&nbsp;}<br>})(); // The two parentheses cause the function to be immediately invoked</blockquote>
Note that you have an <code>immediately invoked function expression</code> (<code>IIFE</code>) that returns an object <code>motionModule</code>. This returned object contains all of the <code>mixin</code> behaviors as properties of the object.
The advantage of the <code>module</code> pattern is that all of the motion behaviors can be packaged into a single object that can then be used by other parts of your code. Here is an example using it:
<blockquote>motionModule.glideMixin(duck);<br>duck.glide();</blockquote>