Loading Modules in JavaScript v2
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// $Revision: 5816 $ | |
var include; | |
if (!include) { include = {}; } | |
include.base = "."; | |
include.ModuleLoader = function ModuleLoader() { | |
this.loadingModules = {}; | |
this.loadedModules = {}; | |
}; | |
include.ModuleLoader.prototype.loadModule = function(module, cb) { | |
if (this.loadedModules[module]) { | |
cb(); | |
return; | |
} | |
if (!this.loadingModules[module]) { | |
this.loadingModules[module] = []; | |
this.addScriptTag(module); | |
} | |
if (cb) { | |
this.loadingModules[module].push(cb); | |
} | |
}; | |
include.ModuleLoader.prototype.addScriptTag = function(module) { | |
var scriptTag = document.createElement("script"); | |
scriptTag.setAttribute("lang", "javascript"); | |
scriptTag.setAttribute("type", "application/javascript"); | |
scriptTag.setAttribute("src", this.moduleNameToFilename(module)); | |
scriptTag.onerror = function() { throw("could not load module " + module); } | |
document.getElementsByTagName("head")[0].appendChild(scriptTag); | |
}; | |
include.ModuleLoader.prototype.moduleNameToFilename = function(module) { | |
var prefix = include.base == "/" ? "/" : include.base + "/"; | |
return prefix + module.replace(/\./g, "/") + ".js"; | |
}; | |
include.ModuleLoader.prototype.moduleLoaded = function(module) { | |
this.loadedModules[module] = true; | |
for (var i = 0; i < this.loadingModules[module].length; i++) { | |
this.loadingModules[module][i](); | |
} | |
delete this.loadingModules[module]; | |
}; | |
include.loader = new include.ModuleLoader(); | |
include.module = function(module, cb) { | |
include.loader.loadModule(module, cb); | |
}; | |
include.moduleLoaded = function(module) { | |
include.loader.moduleLoaded(module); | |
}; |
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