- Categories: JavaScript Methods, JavaScript Reference, Reference
Quick Reference
The Array join() method returns an array as a string leaving the original array unchanged.
<!-- html element to place output -->
<p id='my_cars'></p>
// array
let cars = ['Lamborghini', 'Ferrari', 'Maserati', 'Alfa Romeo'];
// create string from array
let text = cars.join(' and ');
// output results to HTML element
document.getElementById('my_cars').innerHTML = text;
The way this works (see Syntax section below):
- The join() method cycles through the array taking each of the items, and using the separator, creates a string
Output
Lamborghini and Ferrari and Maserati and Alfa Romeo
Syntax
array.join(separator)
Parameters
| Parameter | Description |
|---|---|
| separator | The separator to be used (default is a comma) |
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JAVASCRIPT NOTES:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
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