JavaScript：获取当前执行的< script>节点？ [英] JavaScript: get the current executing <script> node?

问题描述

我需要知道是否可以获取当前的执行节点？

I need to know if it is possible to obtain the current execution node?

示例：

..html
<script id="x">
  console.log(document.currentNode.id); // << this must return "x"
</script>
..html

谢谢！

推荐答案

我不知道100％的确定，但是由 document.getElementsByTagName（'script'）返回的脚本标签的集合不应该包含低于当前正在执行的< script> 的脚本标签。换句话说，我认为这应该工作：

I don't know for 100% sure, but the collection of script tags returned by document.getElementsByTagName('script') should not include the script tags that are below the presently executing <script>. In other words, I think that this should work:

var arrScripts = document.getElementsByTagName('script');
var strScriptTagId = arrScripts[arrScripts.length - 1].id;

这只适用于在页面加载时正在执行的脚本。如果这在延迟脚本中执行或作为页面加载事件的一部分执行，则可能会始终在完全呈现的页面中报告最后一个< script> 。请注意，id标签不是< script> 的有效属性，因此您的页面将不会验证。如果您有任何外部脚本编写脚本标签（例如第三方广告），我认为代码将是不可预测的。我在几年前和这个想法一起玩，结果不能令人满意。

This will only work for scripts that are executing as the page loads. If this executes in a deferred script or as part of a page-load event, it will likely always report the last <script> in the completely rendered page. Note that the id tag is not a valid attribute for <script>, so your page won't likely validate. If you have any external scripts that write script tags (for example, third party ads), I think the code will be unpredictable. I played with this idea a couple years ago and the results were unsatisfactory.

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