fixed header div with scrollable div below

Question

I\'m trying to place two divs one above the other. The top one has a fixed size. The bottom one needs to fill the rest of the page height, without making the page higher if

Answer 1

And in case if anyone wants to solve this keeping things in normal flow and without using flex, then solution is as follows:

html,
    body {
        height: 100%;
    }

    body {
        margin: 0;
    }

    #content {
        height: 100vh;
        position: relative;
        background-color: #C9E6FF;
        margin: 0 auto;
        width: 300px;
    }

    #top-padding {
        background: blue;
        height: 30px;
    }

    #stuff {
        overflow-x:auto;
        background-color: lightgreen;
        height: calc(100vh - 30px);
    }

    

        

            
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