title: replace a string after specific index in javascript str.replace(from, to, indexfrom)
body: <p>I like to replace a string after a specific index. </p>
  
  <p>ex: </p>
  
  <pre><code>var str = "abcedfabcdef"
      str.replace ("a","z",2)
      console.log(str) 
      abcedfzbcdef
  </code></pre>
  
  <p>Is there any way to do this in javascript or in nodeJS?</p>