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Dependency injection Demo
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| <html> | |
| <head> | |
| <title>Dependency injection Demo</title> | |
| <script charset="utf-8"> | |
| /** | |
| * [依赖注入核心定义] | |
| * @param {[type]} win [description] | |
| * @param {[type]} undefined [description] | |
| * @return {[type]} [description] | |
| */ | |
| ;(function(win, undefined){ | |
| /** | |
| * [obj 用于存储定义的对象] | |
| * @type {Object} | |
| */ | |
| var obj = { }; | |
| /** | |
| * [def 定义依赖服务] | |
| * @param {[type]} key [description] | |
| * @param {[type]} val [description] | |
| * @return {[type]} [description] | |
| */ | |
| var def = function(key, val){ | |
| obj[ '$' + key ] = val; | |
| }; | |
| /** | |
| * [run 自动依赖注入并执行] | |
| * @param {Function} fn [description] | |
| * @return {[type]} [description] | |
| */ | |
| var run = function run(fn){ | |
| var deps = fn | |
| .toString() | |
| .match(/([^\(\)]+)/g)[1] | |
| .split(','); | |
| fn.apply(fn, deps.map(function(name, key){ | |
| return obj[ name.trim() ]; | |
| })); | |
| }; | |
| //expose | |
| win.def = def; | |
| win.run = run; | |
| })(window); | |
| </script> | |
| <script charset="utf-8"> | |
| //demo code | |
| /** | |
| * [定义 alert 服务] | |
| * @return | |
| */ | |
| def('alert', function(msg){ | |
| alert(msg); | |
| }); | |
| /** | |
| * [定义 name 服务] | |
| */ | |
| def('name', 'lsong'); | |
| /* | |
| 执行 function 时，自动检测回调函数的依赖项 | |
| 注入到函数的参数中，并执行函数 | |
| */ | |
| run(function($alert, $name){ | |
| $alert($name); | |
| }); | |
| </script> | |
| </head> | |
| <body></body> | |
| </html> |
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