Open External Link As An Overlay On The Same Page

I got a little slider with a black background with opacity: 0.6 This is an external index.html (with a CSS, JS and img folder). I'd like to open that index.html when i hit a link

Solution 1:

If I got u correctly-

functionopenNav() {
    document.getElementById("myNav").style.width = "100%";
}

functioncloseNav() {
    document.getElementById("myNav").style.width = "0%";
}

body {
    margin: 0;
    font-family: 'Lato', sans-serif;
}

.overlay {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0, 0.9);
    overflow-x: hidden;
    transition: 0.5s;
}

.overlay-content {
    position: relative;
    top: 25%;
    width: 100%;
    text-align: center;
    margin-top: 30px;
}

.overlaya {
    padding: 8px;
    text-decoration: none;
    font-size: 36px;
    color: #818181;
    display: block;
    transition: 0.3s;
}

.overlaya:hover, .overlaya:focus {
    color: #f1f1f1;
}

.overlay.closebtn {
    position: absolute;
    top: 20px;
    right: 45px;
    font-size: 60px;
}

@media screen and (max-height: 450px) {
  .overlaya {font-size: 20px}
  .overlay.closebtn {
    font-size: 40px;
    top: 15px;
    right: 35px;
  }
}

<divid="myNav"class="overlay"><ahref="javascript:void(0)"class="closebtn"onclick="closeNav()">&times;</a><divclass="overlay-content"><iframesrc="http://www.w3schools.com/"></iframe></div></div><spanstyle="font-size:30px;cursor:pointer"onclick="openNav()">&#9776; open</span>