Question

我正在使用此脚本，由于我不熟悉JavaScript，因此我想从Google Analytics（分析）脚本“ UA-101203313-3”中获取trackid 更具体地说，我想要这样：const trackid ='UA-101203313-3'。如何找回呢？你能告诉我怎么做吗？

<script async src="https://www.googletagmanager.com/gtag/js?id=UA-101203313-3"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'UA-101203313-3');
</script>

Answer 1

所以，听起来您想抓些文字。您可以使用此正则表达式来匹配脚本src属性

var trackid = text.match(/\?id=(UA-\d+-\d+)/)[1]

这种方式仅在数据是字符串的情况下有效：

const text = `<script async src="https://www.googletagmanager.com/gtag/js?id=UA-101203313-3"><\/script>
<script>
  window.dataLayer = window.dataLayer || [];

  function gtag() {
    dataLayer.push(arguments);
  }
  gtag('js', new Date());

  gtag('config', 'UA-101203313-3');
<\/script>`

var trackid = text.match(/\?id=(UA-\d+-\d+)/)[1]
console.log(trackid)

如果数据已经嵌入在页面中，则可以选择脚本标签并以类似的方式获取它：

var trackid = document.getElementById('google-manager').src.match(/\?id=(UA-\d+-\d+)/)[1]
console.log(trackid)

<script id="google-manager" async src="https://www.googletagmanager.com/gtag/js?id=UA-101203313-3"></script>
<script>
  window.dataLayer = window.dataLayer || [];

  function gtag() {
    dataLayer.push(arguments);
  }
  gtag('js', new Date());

  gtag('config', 'UA-101203313-3');
</script>

在javascript中的脚本中获取值

1 个答案: