how to add a shaodw around a box in javascript code example

Example 1: css box shadow

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

Example 2: box shadow

box-shadow: 0 0 10px 0 rgba(0,0,0,.1);
// copy this

Example 3: css box shadow

box-shadow: 0 0 10px;