how to put image in center of div css code example

Example 1: css center image

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

Example 2: css center image in div

<div style="width: 300px; height: 300px;">
  <img src="./image.png" class="center">
</div>

.center{
  object-fit: scale-down;
  max-width: 100%;
  max-height: 100%;
  height: 15em; /*set your constraint to height/width and set the other to auto*/
  width: auto; 
}

Example 3: css image center

.container {
    position: relative;
    float: right;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.container img {
    position: absolute;
    top: 50%;
    left: 50%;
    width: auto;
    min-width: 100%;
    height: 100%;
    /* height: auto; */
    /* min-height: 100%; */
    margin-right: -50%;
    transform: translate(-50%, -50%);
    object-fit: contain;
    -o-object-fit: contain;
}