问html样式不带标记的特定单词

EN

var StringFire = 'Fire',
    newStringFire = '<span>Fire</span>',
    newTextFire = $('p').text().replace(RegExp(StringFire,"gi"),newStringFire);

$('p').html(newTextFire);

span{
    color: red;
    font-family: sans-serif;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>Fire and Ice. Launch Audio in a New Window. By Robert Frost. Some say the world will end in fire,. Some say in ice. From what I've tasted of desire. I hold with those who favor fire. But if it had to perish twice,. I think I know enough of hate. To say that for destruction ice. Is also great. And would suffice. n/a. More About this ...</p>

var text = $('p').html().replace(/Ice/gi, "<span class='ice'>Ice</span>");
$('p').html(text);

var text = $('p').html().replace(/Fire/gi, "<span class='fire'>Fire</span>");
$('p').html(text);

.ice {
  color: blue;
  font: sans-serif;
}

.fire {
  color: red;
  font: sans-serif;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>Fire and Ice. Launch Audio in a New Window. By Robert Frost. Some say the world will end in fire,. Some say in ice. From what I've tasted of desire. I hold with those who favor fire. But if it had to perish twice,. I think I know enough of hate. To say that for destruction ice. Is also great. And would suffice. n/a. More About this ...</p>

$(document).ready(function(){

 $('#searchfor').keyup(function(){
     page = $('#all_text').text();
     searchedText = $('#searchfor').val();
     $("p:contains('"+searchedText+"')").css("color", "red");
});