dojo中函数的用途是什么？

Question

// Load the dom module
require(["dojo/dom"], function(dom){
});

我知道在加载dom模块时会调用该函数,但我不清楚函数中的代码是什么.它是我页面上所有JavaScript代码的容器吗？

Answer 1

该函数是回调函数,AMD加载程序在加载了您需要的所有模块时将调用它.

如果我有

require(["dojo/_base/ready", "dojo/_base/declare"], function(ready, declare) {

  // do something with declare and ready

});

AMD将准备加载并声明.这可能需要AMD对服务器进行异步调用.一旦AMD加载了模块,它就会调用您传递给require方法的函数.

我在Dojo Builds的答案......？现在怎么办？有关于AMD API的更多详细信息.

回答评论中的问题.以下两个语句可以在页面的任何位置.

<script type="text/javascript">
require(["dojo/_base/ready", "dojo/_base/declare"], function(ready, declare) {
   // do something with declare and ready
});
</script>

<script type="text/javascript">
require(["dojo/_base/ready", "dojo/_base/declare", "dijit/form/Button"], 
   function(ready, declare, Button) {
     // Assuming this is the second statement to be executed, AMD will 
     // realize that ready and declare have previously been loaded,
     // so it will use the previously loaded modules, load the Button module, 
     // and then execute the callback

     // do something with declare, ready, and Button
});
</script>