The toTimeString() method of Date instances returns a string representing the time portion of this date interpreted in the local timezone.

The Atomics.compareExchange() static method exchanges a given replacement value at a given position in the array, if a given expected value equals the old value. It returns the old value at that position whether it was equal to the expected value or not. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.waitAsync() static method waits asynchronously on a shared memory location and returns a Promise.

The Atomics.or() static method computes a bitwise OR with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.xor() static method computes a bitwise XOR with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.and() static method computes a bitwise AND with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.wait() static method verifies that a shared memory location still contains a given value and if so sleeps, awaiting a wake-up notification or times out. It returns a string which is either "ok", "not-equal", or "timed-out".

The transferToFixedLength() method of ArrayBuffer instances creates a new non-resizable ArrayBuffer with the same byte content as this buffer, then detaches this buffer.

The byteLength accessor property of ArrayBuffer instances returns the length (in bytes) of this array buffer.

The detached accessor property of ArrayBuffer instances returns a boolean indicating whether or not this buffer has been detached (transferred).