Javascript 循环浏览HTML文档中的所有单词，如果单词符合特定条件，则向该单词添加一个类

我想循环浏览HTML文档中的所有单词，如果单词是阿拉伯语单词，则在单词中添加一个span。你知道如何在jQuery中实现这一点吗

我尝试了以下方法：

    var text = $('body').text().split(' ');
        for( var i = 0, len=text.length; i<len; i++ ) {

            var mytext = $(this).val();
            var arabic = /[\u0600-\u06FF]/;
            if(arabic.test(mytext)){
              text[i] = '<span class="arabic">' + text[i]  +  '</span>';
            }
        }
            $(this).html(text.join(' '));    
  }

var text=$（'body'）.text（）.split（“”）；
对于（var i=0，len=text.length；i您需要在低于jQuery通常用于：text节点的级别上执行此操作

此HTML：

<p>Hi there</p>

到

只有大约三行更改。
运行此操作时会发生什么？您可能对
<p>I found this information at http://stackoverflow.com.</p>

<p>I found this information at <a href="http://stackoverflow.com">http://stackoverflow.com</a>.</p>

// The regex matches a series of characters in the given range.
// (Double-check this, I believe there's a second Arabic range in
// the Unicode standard, but I know next to nothing about Arabic.)
walk(document.body, /[\u0600-\u06FF]+/);

function walk(node, targetRe) {
  var child;

  switch (node.nodeType) {
    case 1: // Element
      for (child = node.firstChild;
           child;
           child = child.nextSibling) {
        walk(child, targetRe);
      }
      break;

    case 3: // Text node
      handleText(node, targetRe);
      break;
  }
}

function handleText(node, targetRe) {
  var match, targetNode, followingNode, wrapper;

  // Does the text contain our target string?
  match = targetRe.exec(node.nodeValue);
  if (match) {
    // Split at the beginning of the match
    targetNode = node.splitText(match.index);

    // Split at the end of the match.
    // match[0] is the full text that was matched.
    followingNode = targetNode.splitText(match[0].length);

    // Wrap the target in an `span` element with an `arabic` class.
    // First we create the wrapper and insert it in front
    // of the target text. We use the first capture group
    // as the `href`.
    wrapper = document.createElement('span');
    wrapper.className = "arabic";
    targetNode.parentNode.insertBefore(wrapper, targetNode);

    // Now we move the target text inside it
    wrapper.appendChild(targetNode);

    // Clean up any empty nodes (in case the target text
    // was at the beginning or end of a text node)
    if (node.nodeValue.length == 0) {
      node.parentNode.removeChild(node);
    }
    if (followingNode.nodeValue.length == 0) {
      followingNode.parentNode.removeChild(followingNode);
    }

    // Continue with the next match in the node, if any
    match = followingNode
      ? targetRe.exec(followingNode.nodeValue)
      : null;
  }
}