<div class="project-wrapper">
        <h1> Using xml tag to display html codes in web page.  </h1>
        <h3> xml is no more supported by HTML5 </h3>
        <p> 
            Input any number to get square value : <input id="user-input" class="user-input" type = "number"> 
        <button id="user-submit" type="submit" class="submit-button"> Submit </button>
        </p>
        <div id="result-placeholder" >  </div>
    </div>