The crypto getRandomValues() method lets you get cryptographic random values. The array given as the parameter to this method gets filled with cryptographic random numbers.
Syntax:
var a = window.crypto.getRandomValues(Array);
Parameters:
- Array: An integer-based Array, can be Int8Array, UInt8Array, Int16Array, Uint16Array, Int32Array, or Uint32Array. All elements in the array are overwritten with random numbers after using this method.
Return Value: The Array passed in this method is overwritten and returned.
Example: This example uses the getRandomValues() method to generate a random Uint32Array of size 10.
<!DOCTYPE HTML> <html>  <head>     <title>crypto getRandomValues() method</title> </head>   <body style="text-align:center;">     <h1 style="color:green;">          GeeksForGeeks      </h1>     <p>     HTML | crypto getRandomValues() method        </p>     <button onclick = "Geeks();">     click here     </button>     <p id="arr">     </p>           <script>         var arr = document.getElementById("arr");         function Geeks() {             var array = new Uint32Array(10);             a = window.crypto.getRandomValues(array);             console.log(a);             arr.innerHTML =            "The randomly generated array is: "+a;         }     </script> </body>   </html> |
Output:
Before Clicking Button:
After Clicking Button:
Supported Browsers:
- Google Chrome
- Edge
- Firefox
- Safari
- Opera
- Internet Explorer
