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| var Environment = function () { | |
| 'use strict'; | |
| function Environment() { | |
| this.variables = {}; | |
| } | |
| Environment.prototype.exist = function (name) { | |
| return !!this.variables[name]; | |
| }; | |
| Environment.prototype.add = function (name, value) { | |
| if (!this.exist(name)) { | |
| this.variables[name] = []; | |
| } | |
| this.variables[name] = value; | |
| }; | |
| Environment.prototype.get = function (name) { | |
| if (!this.exist(name)) { | |
| throw new Error('The variable name cannot be found'); | |
| } | |
| return this.variables[name]; | |
| }; | |
| Environment.prototype.replace = function (name, value) { | |
| if (!this.exist(name)) { | |
| throw new Error('The variable name cannot be found'); | |
| } | |
| if (this.variables[name] !== value) { | |
| this.variables[name] = value; | |
| } | |
| }; | |
| Environment.prototype.isEmpty = function (name) { | |
| return this.get(name).length === 0; | |
| }; | |
| return Environment; | |
| }; |
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| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| </head> | |
| <body> | |
| <script src="Environment.js"></script> | |
| <script> | |
| var env = new Environment(); | |
| env.add('language', 'ptBR'); | |
| env.add('websocket.url', 'ws://my.ip.server'); | |
| var websocket = new WebSocket(env.get('websocket.url')); | |
| </script> | |
| </body> | |
| </html> |
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