Search and Highlight in jQuery

Question

I would like to search and highlight text using jQuery/Java Script.

sample HTML 1:

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

When i search for String "Good Morning", Both the contents in div1 and div3 should get highlighted. ie. the output html should be

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

I have used the plugin https://raw.github.com/bartaz/sandbox.js/master/jquery.highlight.js to enclose searched content inside span. But only div3 is highlighted. Please help.

Answer 1

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);

try this one it may help you

Answer 2

demo

script

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;
        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>

Answer 3

Try this out:- http://jsfiddle.net/adiioo7/H7CqV/

You need to remove the b tags from div1 and in order to apply bold property you can use css property 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>

or

<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");