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mod.js - A clean and lightweight implementation to define and extend from modules without exposing private members
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| var mod, define; | |
| mod = (function() { | |
| 'use strict'; | |
| var modules = {}; | |
| return { | |
| define: function(name, mod) { | |
| modules[name] = (typeof(mod) == 'function') ? mod : function() { return mod; }; | |
| }, | |
| construct: function(identifier, init) { | |
| var | |
| fn = '__fn__', prop = '__prop__', body = [], | |
| i, mod, module; | |
| body.push('var IDENTIFIER = \'' + identifier + '\', ' + fn + ' = {};'); | |
| body.push(''); | |
| for (i = 2; i < arguments.length; i++) { | |
| mod = arguments[i]; | |
| module = modules[mod]; | |
| if (mod.match(/\./)) { | |
| mod = mod.replace('.', '_'); | |
| } | |
| body.push('var ' + mod + ' = (' + module.toString() + '());'); | |
| body.push(''); | |
| body.push('for (var ' + prop + ' in ' + mod + ') { '); | |
| body.push(' eval(\'var \' + ' + prop + ' + \' = ' + mod + '.\' + ' + prop + ');'); | |
| body.push(' eval(\'' + fn + '.\' + ' + prop + ' + \' = ' + mod + '.\' + ' + prop + ');'); | |
| body.push('}'); | |
| body.push(''); | |
| } | |
| body.push(init.toString().replace(/(^function\s*\(.*?\)\s*\{\s*|\s*$)/, '').replace(/\}$/, '')); | |
| return (new Function(body.join('\n'))()); | |
| } | |
| }; | |
| }()); | |
| define = mod.construct; |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>mod.js example</title> | |
| <script type="text/javascript" src="path/to/mod.js"></script> | |
| </head> | |
| <body> | |
| <script> | |
| mod.define('Counter', function() { | |
| var step = 3; | |
| return { | |
| counter: 0, | |
| increment: function() { | |
| return counter += step; | |
| }, | |
| reset: function() { | |
| counter = 0; | |
| } | |
| }; | |
| }); | |
| var Test = define(function() { | |
| return { | |
| incr: increment, | |
| reset: reset | |
| }; | |
| }, | |
| 'Counter' | |
| ); | |
| console.log(Test.incr()); // 3 | |
| console.log(Test.incr()); // 6 | |
| console.log(Test.incr()); // 9 | |
| console.log(Test.reset()); // undefined | |
| console.log(Test.incr()); // 3 | |
| console.log(Test.incr()); // 6 | |
| console.log(Test.step); // undefined | |
| console.log(Test.counter); // undefined | |
| </script> | |
| </body> | |
| </html> |
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