JavaScript-Code zum Hervorheben von Text

function highlight(text, words, tag) { 
  // Default tag if no tag is provided
  tag = tag || 'span'; 
  var i, len = words.length, re;  for (i = 0; i < len; i++) {    // Global regex to highlight all matches
    re = new RegExp(words[i], &#39;g&#39;);    if (re.test(text)) {
      text = text.replace(re, &#39;<&#39;+ tag +&#39; class="highlight">$&</&#39;+ tag +&#39;>&#39;);
    }
  } 
  return text;
}

function unhighlight(text, tag) {  // Default tag if no tag is provided
  tag = tag || &#39;span&#39;;  var re = new RegExp(&#39;(<&#39;+ tag +&#39;.+?>|<\/&#39;+ tag +&#39;>)&#39;, &#39;g&#39;);  return text.replace(re, &#39;&#39;);
}

$('p').html( highlight(
    $('p').html(), // the text
    ['foo', 'bar', 'baz', 'hello world'], // list of words or phrases to highlight
    'strong' // custom tag));