Using jQuery how can I find and replace a word but keep the HTML? When I do replace() it returns a string with HTML stripped. 
This is an example. I want to replace Hello with Hi but when I use this code the result is stripping away all the HTML. I know I can simply wrap the text with a unique selector, but it's not possible to edit the HTML.
(function($) {
  var string = $('.banner-message');
  string.each(function() {
    var replaced = $(this).text().replace(/Hello /, 'Hi ');
    $(this).html(replaced);
  });
})(jQuery);body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}
.banner-message {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  font-size: 25px;
  text-align: center;
  transition: all 0.2s;
  margin: 0 auto;
  width: 300px;
}
button {
  background: #0084ff;
  border: none;
  border-radius: 5px;
  padding: 8px 14px;
  font-size: 15px;
  color: #fff;
}
.banner-message.alt {
  background: #0084ff;
  color: #fff;
  margin-top: 40px;
  width: 200px;
}
.banner-message.alt button {
  background: #fff;
  color: #000;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="banner-message">
  Hello World
  <button>Change color</button>
</div>
<div class="banner-message">
  Hello World
  <button>Change color</button>
</div>Thank you...
 
     
     
    