Vertically center a div inside another div

Question

I\'m trying to vertical-align: middle a div inside another div, but for some reason it\'s not working properly. What am I doing wrong?

Answer 1

The vertical-align property applies only to inline-level and table-cell elements (source). In your code you're working with block-level elements.

Try this flexbox alternative:

#wrapper {
    border: 1px solid red;
    width: 500px;
    height: 500px;
    display: flex;               /* establish flex container */
    align-items: center;         /* vertically center flex items */
}

#block {
    border: 1px solid blue;
    width: 500px;
    height: 250px;
    /* vertical-align: middle; */
}

    
 I'm Block 

Learn more about flex alignment here: Methods for Aligning Flex Items

Browser support: Flexbox is supported by all major browsers, except IE < 10. Some recent browser versions, such as Safari 8 and IE10, require vendor prefixes. For a quick way to add prefixes use Autoprefixer. More details in this answer.