title: How to open a CSS-only popup automatically on page load/using Javascript?
body: <p>I've created CSS-only popup which is working only by clicking on the link/button. I want to show this popup automatically on page load. Also, how this popup can be opened without clicking on the link/button i.e. By using Javascript/jQuery.</p>
  
  <p><a href="https://jsfiddle.net/qbody1zo/1/" rel="nofollow">Fiddle</a></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.modalDialog {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 99999;
    opacity: 0;
    -webkit-transition: opacity 400ms ease-in;
    -moz-transition: opacity 400ms ease-in;
    transition: opacity 400ms ease-in;
    pointer-events: none;
  }
  .modalDialog:target {
    opacity: 1;
    pointer-events: auto;
  }
  .modalDialog &gt; div {
    width: 400px;
    position: relative;
    margin: 10% auto;
    padding: 5px 20px 13px 20px;
    border-radius: 10px;
    background: #fff;
    background: #339999;
  }
  .close {
    background: #606061;
    color: #FFFFFF;
    line-height: 25px;
    position: absolute;
    right: -12px;
    text-align: center;
    top: -10px;
    width: 24px;
    text-decoration: none;
    font-weight: bold;
    -webkit-border-radius: 12px;
    -moz-border-radius: 12px;
    border-radius: 12px;
    -moz-box-shadow: 1px 1px 3px #000;
    -webkit-box-shadow: 1px 1px 3px #000;
    box-shadow: 1px 1px 3px #000;
  }
  .close:hover {
    background: #00d9ff;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;a href="#openModal"&gt;Open Modal&lt;/a&gt;
  
  &lt;div id="openModal" class="modalDialog"&gt;
    &lt;div&gt;
      &lt;a href="#close" title="Close" class="close"&gt;X&lt;/a&gt;
  
      &lt;p style="color:white"&gt;This is a sample modal box that can be created using the powers of CSS3.&lt;/p&gt;
  
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Thanks in advance </p>