how to make text transparent with stroke in css

h1 {
   -webkit-text-stroke: 1px black;
   color: white;
   text-shadow:
       3px 3px 0 #000,
     -1px -1px 0 #000,  
      1px -1px 0 #000,
      -1px 1px 0 #000,
       1px 1px 0 #000;
}