http://jsfiddle.net/UPs3V/291/

 var src_str = $("#test").text();
var term = "my text";
term = term.replace(/(\s+)/,"(<[^>]+>)*$1(<[^>]+>)*");
var pattern = new RegExp("("+term+")", "gi");

src_str = src_str.replace(pattern, "<mark>$1</mark>");
src_str = src_str.replace(/(<mark>[^<>]*)((<[^>]+>)+)([^<>]*<\/mark>)/,"$1</mark>$2<mark>$4");

$("#test").html(src_str);

试试这个它可能对你有帮助

演示

脚本

jQuery.fn.highlight = function(pat) {
 function innerHighlight(node, pat) {
  var skip = 0;
  if (node.nodeType == 3) {
   var pos = node.data.toUpperCase().indexOf(pat);
   if (pos >= 0) {
    var spannode = document.createElement('span');
    spannode.className = 'highlight';
    var middlebit = node.splitText(pos);
    var endbit = middlebit.splitText(pat.length);
    var middleclone = middlebit.cloneNode(true);
    spannode.appendChild(middleclone);
    middlebit.parentNode.replaceChild(spannode, middlebit);
    skip = 1;
   }
  }
  else if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
   for (var i = 0; i < node.childNodes.length; ++i) {
    i += innerHighlight(node.childNodes[i], pat);
   }
  }
  return skip;
 }
 return this.each(function() {
  innerHighlight(this, pat.toUpperCase());
 });
};

jQuery.fn.removeHighlight = function() {
 function newNormalize(node) {
    for (var i = 0, children = node.childNodes, nodeCount = children.length; i < nodeCount; i++) {
        var child = children[i];
        if (child.nodeType == 1) {
            newNormalize(child);
            continue;
        }
        if (child.nodeType != 3) { continue; }
        var next = child.nextSibling;
        if (next == null || next.nodeType != 3) { continue; }
        var combined_text = child.nodeValue + next.nodeValue;
        let new_node = node.ownerDocument.createTextNode(combined_text);
        node.insertBefore(new_node, child);
        node.removeChild(child);
        node.removeChild(next);
        i--;
        nodeCount--;
    }
 }

 return this.find("span.highlight").each(function() {
    var thisParent = this.parentNode;
    thisParent.replaceChild(this.firstChild, this);
    newNormalize(thisParent);
 }).end();
};

HTML

Search: <input type="text" id="text-search" />

<p><b>Demo </b> he new edition of KnowlEdge K12 enables your school with flexibility by wholly automating their administrative and academic processes. With IncTech’s solution for K12 schools, you can. We give you an internal infrastructure so you can share school and student information. </p>

<script type="text/javascript">
$(function() {
    $('#text-search').bind('keyup change', function(ev) {
        // pull in the new value
        var searchTerm = $(this).val();

        // remove any old highlighted terms
        $('body').removeHighlight();

        // disable highlighting if empty
        if ( searchTerm ) {
            // highlight the new term
            $('body').highlight( searchTerm );
        }
    });
});
</script>

试试这个：- http://jsfiddle.net/adiioo7/H7CqV/

您需要从中删除b标签div1，为了应用粗体属性，您可以使用 css 属性font-weight:bold。

HTML:-

<div id="div1" style="font-weight:bold">Good Morning</div>
<div id="div2">Good Evening</div> 
<div id="div3">Good Morning</div>

或者

<div id="div1"><b>Good Morning</b></div>
<div id="div2">Good Evening</div> 
<div id="div3">Good Morning</div>

JS:-

$("body").highlight("Good Morning");

编辑：highlight是第 3 方 jquery 库，更多信息在这里：http : //johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html

在使用 HTML 标记的所有上述答案搜索中尝试此操作。

又短又甜

这个答案对我在我的项目中实现的完美搜索文本有很大帮助

<script type="text/javascript">
   var term = "my text";
   $('#test').html(function () {
     return $(this).html().replace(new RegExp(term + "(?=[^>]*<)","ig"), "<mark>$&</mark>");
   });
</script>