how to vertical align middle code example

Example 1: css align center

//HTML

	Hello World


//CSS
.parent {
  display: flex;
  justify-content: center;
  align-items: center;
}

Example 2: css vertical center

/*Remove comment to become a better programmer. */
/* No Flexbox */
.parent {
  position: relative;
}
.child {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

/* With Flexbox */

.parent {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

Example 3: vertical align css

.container{
  display: table;
}

.div-inside-container{
  display: table-cell;
  vertical-align: middle;
}

Example 4: center css elements

body{
  display: grid;
  place-items: center;
}

Example 5: vertical align div

HTML:

	

		
Some txt
		
bla bla bla
	


CSS:
div.ext-box { display: table; height: 100%; width:100%;}
div.int-box { display: table-cell; vertical-align: middle; }