- Categories: JavaScript Methods, JavaScript Reference, Reference
Quick Reference
The Array splice() method adds and/or removes array elements, overwriting the original array.
<!-- html element to place output -->
<p id="my_cars"></p>
Example 1
// array
let cars = ['Lamborghini', 'Ferrari', 'Maserati', 'Alfa Romeo'];
// at position 2, add 2 elements
cars.splice(2, 0, 'Astin Martin', 'McLaren');
// output the array items to the HTML element
document.getElementById('my_cars').innerHTML = cars;
Example 2
// array
let cars = ['Lamborghini', 'Ferrari', 'Maserati', 'Alfa Romeo'];
// at position 2, remove 2 elements
cars.splice(2, 2);
// output the array items to the HTML element
document.getElementById('my_cars').innerHTML = cars;
The way this works (see Syntax section below):
- The splice() method goes to a specified position in the array (in this case 2) and either adds or removes items
Output
Example 1
Lamborghini,Ferrari,Astin Martin,McLaren,Maserati,Alfa Romeo
Example 2
Lamborghini,Ferrari
Syntax
array.splice(index, howmany, item1, item2, etc.)
Parameters
| Parameter | Description |
|---|---|
| index | The position to add/remove items; negative value defines the position from the end of the array (required) |
| howmany | Number of items to be removed |
| item1, item2, etc. | New elements(s) to be added |
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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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