TypedArray.prototype.join()

The join() method joins all elements of an array into a string. This method has the same algorithm as Array.prototype.join(). TypedArray is one of the typed array types here.

Syntax

join()
join(separator)

Parameters

separator Optional

Specifies a string to separate each element. The separator is converted to a string if necessary. If omitted, the typed array elements are separated with a comma (",").

Return value

A string with all array elements joined.

Examples

Using join()

var uint8 = new Uint8Array([1,2,3]);
uint8.join();      // '1,2,3'
uint8.join(' / '); // '1 / 2 / 3'
uint8.join('');    // '123'

Polyfill

Since there is no global object with the name TypedArray, polyfilling must be done on an "as needed" basis.

// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.join
if (!Uint8Array.prototype.join) {
  Object.defineProperty(Uint8Array.prototype, 'join', {
    value: Array.prototype.join
  });
}

If you need to support truly obsolete JavaScript engines that don't support Object.defineProperty, it's best not to polyfill Array.prototype methods at all, as you can't make them non-enumerable.

Specifications

Browser compatibility

See also

• A polyfill of TypedArray.prototype.join is available in core-js
• TypedArray
• Array.prototype.join()