How do you set, clear and toggle a single bit in JavaScript?

JS-bit-operations.js

To get a bit mask:

var mask = 1 << 5; // gets the 6th bit

To test if a bit is set:

if ((n & mask) != 0) {
  // bit is set
} else {
  // bit is not set
}

To set a bit:

n |= mask;

To clear a bit:

n &= ~mask;

To toggle a bit:

n ^= mask;

Refer to the Javascript bitwise operators (https://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Operators/Bitwise_Operators).

Source: http://stackoverflow.com/questions/1436438/how-do-you-set-clear-and-toggle-a-single-bit-in-javascript