how to style as placeholder in css code example

Example 1: css style placeholder

input::-webkit-input-placeholder {/* Chrome/Opera/Safari/Edge */
	/*styles here*/
}

input::-ms-input-placeholder { /* Microsoft Edge */
   /*styles here*/
}

input:-ms-input-placeholder {/* IE 10+ */
	/*styles here*/
}

input::-moz-placeholder {/* Firefox 19+ */
	opacity: 1; /*Firefox by default has an opacity object that usually is ideal to reset so it matches webkit*/
	/*styles here*/
}

input:-moz-placeholder {/* Firefox 18- */
	opacity: 1; /*Firefox by default has an opacity object that usually is ideal to reset so it matches webkit*/
	/*styles here*/
}

input::placeholder {
	/*styles here*/
}

Example 2: css style placeholder

<!DOCTYPE html>
<html lang="en">
   <head>
      <title>Placeholder - Style</title>
      <style>
         ::placeholder {
            color: green;
         }

         .force-opaque::placeholder {
            opacity: 1;
         }
      </style>
   </head>
   <body>
      <input placeholder="Default opacity..." />
      <input placeholder="Full opacity..." class="force-opaque" />
   </body>
</html>

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