JavaScript实时网页内容替换：监听指定内容并替换

日期: 2026-05-04

标签: 常规

<html>
<head>
<script>
function replaceText() {
  var elements = document.getElementsByTagName('*');
  for (var i = 0; i < elements.length; i++) {
    var element = elements[i];
    for (var j = 0; j < element.childNodes.length; j++) {
      var node = element.childNodes[j];
      if (node.nodeType === 3) {
        var text = node.nodeValue;
        var replacedText = text.replace(/指定内容/g, '');
        if (replacedText !== text) {
          element.replaceChild(document.createTextNode(replacedText), node);
        }
      }
    }
  }
}
setInterval(function() { replaceText() }, 1000);
</script>
</head>
<body>
<!-- 在这里添加需要监听的内容 -->
</body>
</html>

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