Answers for "center a css"

css center

/* this will center all children within the parent element. */
.parent {
  display: flex;
  justify-content: center; /* horizontal */
  align-items: center; /* vertical */
}

center a div css

.center {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

center with css

.parent {
  position: relative;
}
.child {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

mettre une image au milieu css

IMG.displayed {
    display: block;
    margin-left: auto;
    margin-right: auto }
 ...
<IMG class="displayed" src="..." alt="...">

css center

// example 1 
div { display: grid; place-items: center; }

// example 3
div{ display:flex; align-items:center; }

// example 3
div { width: 100%; margin: 0 auto; }

aligner et centrer element css html

<nav class="navigation">
          <div>
            <ul>
                <li class=item_1>FindThePrecious.com</li>
                <li class=item_2>Fellows</li>
                <li class=item_3>Contact us</li>
            </ul>
          </div>
        </nav>

.navigation{
  width: 100%;
  height: 1.8em;
  
}

li {
  display: inline;
  padding:5px;
  
}
////////////////////////////////////////////////////
 <section>
 <div class = "portrait">
          <img class="demo_portrait_1"
     src="https://via.placeholder.com/150" alt="portrait"> 
           <img class="demo_portrait_1"
     src="https://via.placeholder.com/150" alt="portrait_demo"> 
          <img class="demo_portrait_1"
     src="https://via.placeholder.com/150" alt="portrait_demo">
            </div>
</section>
                   //////// css///////////
.portrait{
text-align: center;
}

.demo_portrait_1{ 
  padding:10px;
  height: 400px;
  width: 400px;     
}