dojo.connect不会按钮连接的“onClick” [英] dojo.connect won't connect 'onclick' with button

问题描述

我遇到一个问题，使用dojo.connect（）来连接这个按钮的的onclick事件：

I'm running into a problem using dojo.connect() to connect an 'onclick' event with this button:

<button dojoType="dijit.form.Button" widgetId="inbox_button" id="inbox_button">Inbox</button>

和code使得连接是：

and the code making the connection is:

var inbox_button=dojo.byId("inbox_button");
dojo.connect(inbox_button,'onclick',function(){
    var container=dijit.byId("center");
    container.addChild(new dijit.layout.ContentPane({region: "left", content: "...", style: "width: 100px;"}))
});

然而，而不是在单击按钮时执行的功能，任何onclick事件触发功能，我结束了许多孩子的容器。

However, instead of executing the function when the button is clicked, ANY onclick event triggers the function, and I end up with a lot of children containers.

虽然我pretty一定的.connect（）函数应可作为Dojo的基本功能的一部分，我'需要'它明确：

Even though I'm pretty certain the .connect() function should be available as part of dojo's base functionality, I've 'required' it explicitly:

dojo.require("dojo._base.connect");

任何想法，为什么这可能发生？

Any ideas as to why this might be happening?

推荐答案

正如你所说，如果运行code前的DOM准备就绪，dojo.byId（inbox_button）将返回null。所以，你的连接实际上是这样做的：

As you say, if you run that code before the DOM is ready, dojo.byId("inbox_button") will return null. So your connect is actually doing:

dojo.connect(null, "onclick", function() { ... })

..如果第1个参数dojo.connect为空，全局或'窗口'对象将被使用。

.. if the 1st arg to dojo.connect is null, the global or 'window' object will be used.

不过，这是这里只是一个错误。您按钮元素越来越小部件，美化版，并变成了dijit.form.Button。所以，你应该连小部件的onClick方法在这里，而不是节点的onclick：

But, that's just one error here. Your button element is getting widget-ized, and turned into a dijit.form.Button. So you should be connecting to the widget's onClick method here, not the node's onclick:

dojo.connect(dijit.byId("inbox_button"), "onClick", function() { ... });

另外，要清楚，你永远不应该有dojo.require在dojo._base什么，就是这样的dojo.js的承诺让你 - 所有的捆绑

Also, to be clear, you should never have to dojo.require anything in dojo._base, that's the promise that dojo.js makes to you - its all bundled in.

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