摘要：:The “” is a tool for the order of an HTML .In this , we wi...

:

The “” is a tool for the order of an HTML .

In this , we will how to use the “” to into a in the .

Part 1: The

we dive into more , let’s first go over the of using “”.

The for using this is as :

.(, );

Here, “” to the to which we wish to add the new , “” is the we want to add, and “” is the which we want to add the new .

For , let’s say we have the HTML:

```

1

2

3

方法 指定位置 元素插入 节点操作 DOM操作

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