title: Highlight specific strings in a given long string in Javascript
body: <p>I have a long string, and a list of other strings, which I need to mark in the long string.
  Say we have <code>abcdefghijk</code> and the strings I need to mark are <code>ghi</code> and <code>abc</code>.</p>
  
  <p>What is the simplest way to do it in Javascript and CSS? I thought about using the <code>exec()</code> method that will return the starting index of the string in the long string. </p>
  
  <p>Then, I'd have the starting index and the size of the string. So, I could find it in the long string. How could I highlight it? Maybe using CSS?</p>