Insecure randomness in javascript code

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Javascript

var array = new Uint32Array(10);
window.crypto.getRandomValues(array);

console.log("Your lucky numbers:");
for (var i = 0; i < array.length; i++) {
console.log(array[i]);
}

Above javascript code is not working in IE.11 version.

Can somebody help me please.

Thank you

What I have tried:

Tried to generate the cryptographic random numbers using javascript code,
but showing undefined getRandomValues() function.