如何在图片中将div居中？ （使用flex但不使用background-img）

Question

As usual I am desesperately trying everything with css for hours ;) if it's not clear enough I am sorry, I try to make it as understandable as posisble.

I have a blured image and would like to put a div inside it, and center it. the best would be to have the two elements next to each other

<parent/>
<child/>

because the parent is blured and the child isn't. I tried this

<parent class="blured">
    <child class="notblured"/>
</parent>

.blured{
    -moz-filter: blur(5px);
    -ms-filter: blur(5px);
    filter: blur(5px);
}

.notblured{
    -moz-filter: blur(0) !important;
    -ms-filter: blur(0) !important;
    filter: blur(0) !important;
}

child{
    margin: auto;
    width: 19em;
}
parent{
    display: flex;
    justify-content: center;
    align-items:center;
}

But this doesn't work, both are blured + my image isn't really the way I want it

So I would prefer to have them next to each others and then I can just center it manually, but it's not responsive then...

child{
    padding: 1.5em;
    text-align:center;
    width: 19em;
    padding-top:0.5em;
    position: absolute;
    margin-left: auto;
    margin-right: auto;
    top: 6em;
    left: 0;
    right: 0;
}

Any suggestion?

Answer 1

Use an outer element as parent for both, and center the child with the following CSS:

 .blured { -moz-filter: blur(5px); -ms-filter: blur(5px); filter: blur(5px); } .outer{ position: relative; width: 500px; height: 300px; } .child { position: absolute; left: 50%; top: 50%; width: 150px; height: 100px; background: blue; transform: translate(-50%, -50%); } .parent { position: absolute; left: 0; top: 0; height: 100%; width: 100%; background: red; } 

 <div class="outer"> <div class="parent blured"> </div> <div class="child"> </div> </div> 

Answer 2

Put the image with the filter blur on a pseudo element :before or :after , that way the filter does not affect the child elements. Needs some z-index too to work with this exact approach.

 .parent { position: relative; display: flex; justify-content: center; align-items:center; min-height: 100vh; } .parent:before { content: ''; position: absolute; height: 100%; width: 100%; background-image: url('https://picsum.photos/200/300'); background-size: cover; -moz-filter: blur(5px); -ms-filter: blur(5px); filter: blur(5px); z-index: 1; } .child { position: relative; color: white; background: green; min-height: 200px; min-width: 300px; z-index: 9; } 

 <div class="parent blured"> <div class="child">CHILD</div> </div>