a/20049344/1636522

HTML

<input id="search" value="^()\w\d$" />
<button id="submit">Highlight!</button>
<button id="revert">Revert!</button>
<p id="sample">Sample string ^()\w\d$ contains regexp</p>

CSS

b {
    color:red
}

JavaScript

$('#submit').click(function () {    
    $('#sample ').html(function(i, html){
        return html.replace(new RegExp(
            $('#search').val().replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'), 'gi'), '<b class="highlight">$&</b>');
    });
});

$('#revert').click(function(){
    $(".highlight").contents().unwrap();
});