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