how to give shadow to button in css code example

Example 1: css shadow

.yourElement {
  /* offset-x | offset-y | blur-radius | spread-radius | color */
  -webkit-box-shadow: -2px -1px 15px 7px rgba(0,0,0,0.5);
  -moz-box-shadow: -3px -2px 30px 14px rgba(0,0,0,0.425);
  box-shadow: -4px -3px 45px 21px rgba(0,0,0,0.35);
}

Example 2: css box shadow

#example1 {
  box-shadow: 10px 10px 8px #888888;
}

Example 3: box shadow css

box-shadow: 3px 3px 6px 5px #ccc;

or

box-shadow: 0px 5px 17px -7px rgba(0, 0, 0, 0.75);

Example 4: html make box shadow

box-shadow: 0 20px 20px rgba(0, 0, 0, 0.2), 0px, 0px, 50px rgba(0, 0, 0, 0.2)