如何将文字附加到当前位置？ [英] How to append text to current position?

问题描述

<div>
HI!
<script>
var spanNode = document.createElement('span');
var textNode = document.createTextNode('there.');
//how to append here spanNode?
</script>
How are you?
</div>

我不想使用document.write（）方法。那么，我应该在这里使用什么，所以结果是这样的：

I don't want to use document.write() method. So, what should I use here so the result would be like this:

<div>HI!<span>there.</span>How are you?</div>

推荐答案

A < script>默认情况下元素立即执行，因此在执行时只有< div> HI！ < script /> 在文档中，你好吗部分尚未处理。在这个元素中，当前处理的< script> 元素将是文档中的最后一个脚本元素，因此您可以使用 document.scripts [ document.scripts.length - 1] ，然后找到它的父节点并附加元素。

A <script> element by default is executed immediately, so at the moment of execution there's just <div>HI! <script /> in the document, the "How are you" part hasn't been processed yet. At this moement the currently processed <script> element will be the last of script elements in your document so you can reference it using document.scripts[ document.scripts.length - 1 ], then find its parent node and append the elements.

<div>
HI!
<script>
var spanNode = document.createElement('span');
var textNode = document.createTextNode('there.');
    spanNode.appendChild( textNode );
/* this is the currently interpreted <script> element
   so you can append a child to its parent.
*/
document.scripts[ document.scripts.length - 1 ].parentNode.appendChild( spanNode );
</script>
How are you?
</div>

http://jsfiddle.net/0LsLq9x7/

编辑：为了保持全局命名空间的清洁，你可以将代码包装在一个立即执行的匿名函数中： http://jsfiddle.net/0LsLq9x7/1/

to keep the global namespace clean you could wrap the code in an anonymous function which executes immediately: http://jsfiddle.net/0LsLq9x7/1/

<div>
HI!
<script>
(function( scriptElement ){
    // these variables will be local to this closure
    var spanNode = document.createElement('span');
    var textNode = document.createTextNode('there.');
    spanNode.appendChild( textNode );
    scriptElement.parentNode.appendChild( spanNode );
// pass a reference to the script element as an argument to the function
}(document.scripts[ document.scripts.length - 1 ]));
</script>
How are you?
</div>

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