title: Header - Footer Include in another Html file
body: <p>I am creating a website and I would like to be able to add external html files to another html file. I have three files. One is Header.html, the other one is the index.html, and the other one is the footer.html. What I would like is to add header and footer inside each of the new pages that I create for my website so I can update header or footer and be updated to all the pages that are included. I know, and I have done this before using server side programming language like PHP, and I have used w3schools method. Both are working, but I would like to find new ways of implement html to another html document but to <strong>be supported</strong>. I would like <strong>plain JS</strong> way, or <strong>html way</strong>. <strong>No jQuery</strong>. Hopefully someone guru out there can help me.</p>
  
  <p>Thanks.</p>