problem with regex replacement
I am trying to highlight the word that has been passed in using regex & css. But something seems to have gone wrong. can anyone please help me? $1 doesn't seem to work here as its not replacing with the word.
<head>
<title>Example</title>
<style type="text/css">
.highlight{
color: maroon;
font-size: 22px;
}
</style>
<script type="text/javascript" src="../scripts/jquery-1.4.js"></script>
<script type="text/javascript">
function getSentence(word) {
var sentence="here is the text";
if (sentence.toLowerCase().indexOf(word.toLowerCase())!=-1) {
sentence=sentence.replace(new RegExp('\\b'+(word)+'\\b', 'g'), '<span class="highlight">\$1</span>');
$("#placeholder").append("<h3>"+sentence+"</h3><br/>");
}
}
</script&开发者_运维技巧gt;
<form>
<div>
<a onclick=getSentence('text');>text</a>
</div>
<div id="placeholder"></div>
</form>
You're not setting any capture groups, so you should use $& instead of $1 in your replace method.
See example →
The capture brackets in your regular expression are in the wrong place. At the moment the brackets disappear as they are not literal but merely has a grouping function. Your regex should work if you place the brackets in the quotes like so:
'\\b(' + word + ')\\b'
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