How to make my footer cover 100% height and width of the page from top?

Question

I have an html page with header, footer and content. When user clicks on my footer, I want the footer to cover the whole page starting from the top. When i set the height and width of footer to be 100vh and 100vw. It makes it from the bottom. How do i make it cover from the top?

Answer 1

You need to use percentage % instead of vh/vw/px . You need to set top:0; and height: 100% (Full Height of device screen).

 function toggle() { var className = document.getElementById('footer').className; if (className == 'footer') { document.getElementById('footer').innerText = 'Click to minimize'; document.getElementById('footer').className = 'footer full'; } else { document.getElementById('footer').innerText = 'Click to miximize'; document.getElementById('footer').className = 'footer'; } }

 .footer { background-color: #000; color: #FFF; width: 100%; padding: 20px 0; }.full { height: 100%; width: 100%; position: fixed; top: 0px; left: 0px; }

 <h1>My heading</h1> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <p> Hello, this click on the footer to expand it. </p> <br> <div id='footer' class='footer' onClick='toggle()'> Click to maximise </div>

Answer 2

Try this:

$('.footer').click(function(){
        $(this).toggleClass('new_footer');
    });



.new_footer{
    background-color: #000;
    position: fixed;
    top: 0;'
    left: 0;
    right: 0;
    bottom: 0;
    height: 100vh;
    width: 100%;
    color: #fff;
}

<header>
  My heaader
</header>

<div>content</div>

<div class="footer">
 My footer
</div>