Unfamiliar characters used in JavaScript encryption script

Question

Here is an excerpt from a JS encryption script that I am studying.

function permutationGenerator(nNumElements) {
    this.nNumElements     = nNumElements;
           


        

Answer 1

Left shift 8 bits and bitwise OR with j.

<< is the left shift operator. Shifts the bits in the variable left the number of positions indicated.

>> is the right shift operator. Shifts the bits in the variable right the number of position indicated.

| is the bitwise OR operator. Performs a logical OR on each bit in the two operands.

& is the bitwise AND operator. Performs a logical AND on each bit in the two operands.