z-index with lower value still appears over other div

Question

Why does VideoDivNote still appear over VideoDiv even though it has a lower z-index? There is some problem using <div> or am I doing something else wrong?

<style>

    #VideoDiv
    {position: absolute;
    left: 3%;
    bottom: 5%;
    z-index: 999;
    background-color: #DCDCDC;
    height: 260px;
    width: 424px;
    text-align: center;
    border: 1px solid #d3d3d3;
    -webkit-border-radius: 20px;
    -moz-border-radius: 20px;
    border-radius: 20px;
    }

    #VideoDivNote
    {height: 30px;
    position: relative;
    width: 300px;
    margin: auto;
        left: 0px;
        right: 0px;
        bottom:0px;
    background-color: rgba(8, 8, 8, 0.7);
    -webkit-border-radius: 0px 0px 15px 15px;
    -moz-border-radius: 0px 0px 15px 15px;
    border-radius: 0px 0px 15px 15px;
    z-index: 1;
    }


    #VideoMessage
    {color: #fff;
    font-family: acme;
    position: relative;
    bottom: -6px;
    z-index: 2;
    }

 </style>

    <div id="VideoDiv">

        <div id="VideoPlayer"></div>
        <div id="VideoDivNote"><span id="VideoMessage">z-index not working</span></div>

    </div>

because its parent create a stacking context thus all the child inside will be rendred inside — Temani Afif, Feb 12 '19 at 11:29
related : https://stackoverflow.com/a/52074840/8620333 / https://stackoverflow.com/a/51603436/8620333 — Temani Afif, Feb 12 '19 at 11:31
https://philipwalton.com/articles/what-no-one-told-you-about-z-index/ — 04FS, Feb 12 '19 at 12:15

score 0 · Answer 1 · answered Feb 12 '19 at 11:56

Thanks to Temani Afif for details explanation. You need to remove z-index from #VideoDiv and use z-index: -1; in #VideoDivNote id. See below or check this link

    #VideoDiv
    {position: absolute;
    left: 3%;
    bottom: 5%;
    background-color: #DCDCDC;
    height: 260px;
    width: 424px;
    text-align: center;
    border: 1px solid #d3d3d3;
    -webkit-border-radius: 20px;
    -moz-border-radius: 20px;
    border-radius: 20px;
    }

    #VideoDivNote
    {height: 30px;
    position: relative;
    width: 300px;
    margin: auto;
        left: 0px;
        right: 0px;
        bottom:0px;
    background-color: rgba(8, 8, 8, 0.7);
    -webkit-border-radius: 0px 0px 15px 15px;
    -moz-border-radius: 0px 0px 15px 15px;
    border-radius: 0px 0px 15px 15px;
    z-index: -1;
    }


    #VideoMessage
    {color: #fff;
    font-family: acme;
    position: relative;
    bottom: -6px;
    z-index: 2;
    }

<div id="VideoDiv">
   <div id="VideoPlayer"></div>
   <div id="VideoDivNote"><span id="VideoMessage">z-index not working</span></div>
</div>

Thank you! It works properly now. I just don't get it though. — Simone Pinto, Feb 12 '19 at 12:45

score -3 · Answer 2 · answered Feb 12 '19 at 11:31

just make sure that your message div has higher z-index than the other one

<style>

    #VideoDiv
    {position: absolute;
    left: 3%;
    bottom: 5%;
    z-index: 999;
    background-color: #DCDCDC;
    height: 260px;
    width: 424px;
    text-align: center;
    border: 1px solid #d3d3d3;
    -webkit-border-radius: 20px;
    -moz-border-radius: 20px;
    border-radius: 20px;
    }

    #VideoDivNote
    {height: 30px;
    position: relative;
    width: 300px;
    margin: auto;
        left: 0px;
        right: 0px;
        bottom:0px;
    background-color: rgba(8, 8, 8, 0.7);
    -webkit-border-radius: 0px 0px 15px 15px;
    -moz-border-radius: 0px 0px 15px 15px;
    border-radius: 0px 0px 15px 15px;
    z-index: 1;
    }


    #VideoMessage
    {color: #fff;
    font-family: acme;
    position: relative;
    bottom: -6px;
    z-index: 1000;
    }

 </style>

    <div id="VideoDiv">

        <div id="VideoPlayer"></div>
        <div id="VideoDivNote"><span id="VideoMessage">z-index not working</span></div>

    </div>

z-index with lower value still appears over other div

2 Answers2