基于jquery文字高亮显示效果代码

时间：2022-06-25 20:34:10 编辑：袖梨来源：一聚教程网

提示：您可以先修改部分代码再运行

Search: <input type="text" id="text-search">
<p><b>This can include web design, web content development, client liaison, client-

side/server-side scripting, web server and network security configuration, and e-commerce

development. However, among web professionals, "web development" usually refers to the main

non-design aspects of building web sites: writing markup and coding. Web development can

range from developing the simplest static single page of plain text to the most complex

web-based internet applications, electronic businesses, or social ntwork services.</b></p>
(Text from Wikipedia)
<script type="text/javascript" src="http://ajax.*goo*gleapi*s.com/ajax/libs/jquery/1/jquery.min.js%0A"></script>
<script type="text/javascript">
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();
};
</script>
<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>

提示：您可以先修改部分代码再运行

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