Created
April 16, 2015 18:11
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Dynamically changing prototypes in Js
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| <html> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1" /> | |
| <title>Brian Blessed demo</title> | |
| <style type="text/css"> | |
| .out { | |
| font-weight: bold; | |
| } | |
| body { | |
| font: 14/20px sans-serif; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| Normal: <span class="out normal"></span><br /> | |
| Patched: <span class="out patched"></span> | |
| <script type="text/javascript"> | |
| // This works with Babel | |
| class Name { | |
| constructor(first, last) { | |
| this.first = first; | |
| this.last = last; | |
| } | |
| getFull() { | |
| return this.first + ' ' + this.last; | |
| } | |
| } | |
| (function() { | |
| var orig = Name.prototype.getFull; | |
| Object.defineProperty(Name.prototype, 'getFull', { | |
| get: function() { | |
| if (this.first === 'Brian' && this.last === 'Blessed') { | |
| return function() { | |
| return 'I AM BRIAN BLESSED!'; | |
| } | |
| } else { | |
| return orig; | |
| } | |
| } | |
| }); | |
| }()); | |
| document.addEventListener('DOMContentLoaded', function() { | |
| var john = new Name('John', 'Doe'); | |
| var brian = new Name('Brian', 'Blessed'); | |
| document.querySelector('.out.normal').innerHTML = john.getFull(); | |
| // => John Doe | |
| document.querySelector('.out.patched').innerHTML = brian.getFull(); | |
| // => I AM BRIAN BLESSED! | |
| }); | |
| </script> | |
| </body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1" /> | |
| <title>Brian Blessed demo</title> | |
| <style type="text/css"> | |
| .out { | |
| font-weight: bold; | |
| } | |
| body { | |
| font: 14/20px sans-serif; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| Normal: <span class="out normal"></span><br /> | |
| Patched: <span class="out patched"></span> | |
| <script type="text/javascript"> | |
| function Name(first, last) { | |
| this.first = first; | |
| this.last = last; | |
| } | |
| Name.prototype.getFull = function() { | |
| return this.first + ' ' + this.last; | |
| }; | |
| (function() { | |
| var orig = Name.prototype.getFull; | |
| Object.defineProperty(Name.prototype, 'getFull', { | |
| get: function() { | |
| if (this.first === 'Brian' && this.last === 'Blessed') { | |
| return function() { | |
| return 'I AM BRIAN BLESSED!'; | |
| } | |
| } else { | |
| return orig; | |
| } | |
| } | |
| }); | |
| }()); | |
| document.addEventListener('DOMContentLoaded', function() { | |
| var john = new Name('John', 'Doe'); | |
| var brian = new Name('Brian', 'Blessed'); | |
| document.querySelector('.out.normal').innerHTML = john.getFull(); | |
| // => John Doe | |
| document.querySelector('.out.patched').innerHTML = brian.getFull(); | |
| // => I AM BRIAN BLESSED! | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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