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
typedarray.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
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
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'TypedArray.prototype.join' in that specification. |
Standard | Initial definition. |
ECMAScript 2017 Draft (ECMA-262) The definition of 'TypedArray.prototype.join' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | 37 (37) | No support | No support | No support |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | No support | No support | 37.0 (37) | No support | No support | No support |