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JavaScript Cryptographically random data


Example

// Create an array with a fixed size and type.
var array = new Uint8Array(5);

// Generate cryptographically random values
crypto.getRandomValues(array);

// Print the array to the console
console.log(array);

crypto.getRandomValues(array) can be used with instances of the following classes (described further in Binary Data) and will generate values from the given ranges (both ends inclusive):

  • Int8Array: -27 to 27-1
  • Uint8Array: 0 to 28-1
  • Int16Array: -215 to 215-1
  • Uint16Array: 0 to 216-1
  • Int32Array: -231 to 231-1
  • Uint32Array: 0 to 231-1