/* CSSファイル内に記述する場合 */
@import url('https://unpkg.com/@phosphor-icons/web@2.1.1/src/regular/style.css');

@regular（通常）
https://unpkg.com/@phosphor-icons/web@2.1.1/src/regular/style.css

@thin（一番細いラインのもの）
https://unpkg.com/@phosphor-icons/web@2.1.1/src/thin/style.css

@light（regularとthinの間の細さのラインのもの）
https://unpkg.com/@phosphor-icons/web@2.1.1/src/light/style.css

@fill（regularに塗りが足されたもの）
https://unpkg.com/@phosphor-icons/web@2.1.1/src/fill/style.css

-webkit-tap-highlight-color: transparent;
<script type="text/javascript">
// -------------------------------------------------------------
// 下記javascriptを使用すると、指定したＫＥＹが抑止されます 
// -------------------------------------------------------------
window.document.onkeydown = function(evt){
 if ((evt.which == 112)
 || (evt.which == 71 && evt.ctrlKey == true)
 || (evt.which == 70 && evt.ctrlKey == true)
 || (evt.which == 85 && evt.ctrlKey == true)
 || (evt.which == 114)
 || (evt.which == 115)
 || (evt.which == 82 && evt.ctrlKey == true)
 || (evt.which == 116)
 || (evt.which == 122)
 || (evt.which == 73 && evt.ctrlKey == true && evt.shiftKey == true)
 || (evt.which == 77 && evt.ctrlKey == true && evt.shiftKey == true)
 || (evt.which == 74 && evt.ctrlKey == true && evt.shiftKey == true)
 || (evt.which == 123)
 || (evt.which == 121)
 || (evt.which == 13)
 || (evt.which == 27)
 || (evt.which == 32)
 || (evt.which == 46)
 || (evt.which == 16)
 || (evt.which == 44)
 || (evt.which == 91)
 || (evt.which == 92)
 || (evt.which == 65 && evt.ctrlKey == true)
 || (evt.which == 17)
 || (evt.which == 83 && evt.ctrlKey == true)
 || (evt.which == 229 && evt.ctrlKey == true)
 || (evt.which == 80 && evt.ctrlKey == true)
 || (evt.which == 74 && evt.ctrlKey == true)
 ){ evt.which = null;
 return false;}
 document.oncontextmenu = function() {return false;}
}
</script>