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
