如何在另一个.js文件中访问全局JS对象
[英]How to acces a global JS-Object in another .js-File
问题描述
How do i acces an object which was initialized in my HTML-Document? 
如何访问在HTML文档中初始化的对象？
My HTML-Document looks like this: 我的HTML文档如下所示：
...
<script type="text/javascript" id="controller">var controller = false;</script>
...
<body onload="controller = new CTRLclass()">
....
How do I call controller.doAMethod() in an external Javascript-File using DOM-Operations or simmilar? 如何使用DOM-Operations或simmilar在外部Javascript-File中调用controller.doAMethod（）？
edit: PPL, i have many .js-Files and my controller is creating an instance of another class in his constructor. 编辑：PPL，我有很多.js文件，我的控制器正在他的构造函数中创建另一个类的实例。 In the created instance of the class i need acces to the controller to call an update-Function. 在创建的类实例中，我需要访问控制器以调用update-Function。 Like: controller -> creates instance of class. 像：控制器->创建类的实例。 class -> needs to call controller.update(). 类->需要调用controller.update（）。 How do i acces controller in 'class' - Thats all 我如何在“班级”访问控制器-就是所有
THX! 谢谢！
2 个解决方案
解决方案1
1 2011-04-15 15:36:22
You don't need the onload tag to initiate onload tasks. 您不需要onload标记来启动onload任务。 Just put this is the external javascript file: 只需将其放在外部javascript文件中即可：
var controller = false;
function Init(){
controller = new CTLRclass;
}
function addEvent(el, eType, fn, uC) {
var uC = uC || true;
if (el.addEventListener) {
el.addEventListener(eType, fn, uC);
return true;
} else if (el.attachEvent) {
return el.attachEvent('on' + eType, fn);
} else {
el['on' + eType] = fn;
}
}
addEvent(window, 'load', Init);
解决方案2
0 2011-04-15 15:32:26
I actually can't envisage why you would want to do the above. 实际上，我无法想象您为什么要执行上述操作。 Simply strip out all of the Javascript in the above, so all you have is: 只需剥离上面的所有Javascript，那么您所拥有的就是：
... ...
<script type="text/javascript" src="myjsfile.js"></script>
...
<body>
....
And in myjsfile.js do somthing like 在myjsfile.js中做类似
window.onload = function(){
var controller = new CTRLclass();
}
If it must be global, then you can move it outside of the onload function: 如果必须是全局的，则可以将其移到onload函数之外：
var controller = false
window.onload = function(){
controller = new CTRLclass();
}
Use of jQuery would make it more elegant, of course, as you wouldn't risk overriding any existing onloads: 当然，使用jQuery会使它更加优雅，因为您不必冒险覆盖任何现有的onload：
var controller = false
$(document).ready(function(){
controller = new CTRLclass();
});
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