JavaScript Array.splice() Method Example

The JavaScript Array splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place.

JavaScript Array.splice() Method Examples

Example 1: Add items to the array

var progLangs = ['C', 'C++', 'Java', 'PHP', 'Python'];
progLangs.splice(3,0,'Java EE', 'Scala');
console.log(progLangs);

Output:

["C", "C++", "Java", "Java EE", "Scala", "PHP", "Python"]

Example 2: Remove 0 (zero) elements from index 2, and insert "drum"

var myFish = ['angel', 'clown', 'mandarin', 'sturgeon'];
var removed = myFish.splice(2, 0, 'drum');

// myFish is ["angel", "clown", "drum", "mandarin", "sturgeon"] 
// removed is [], no elements removed

Example 3: Remove 0 (zero) elements from index 2, and insert "drum" and "guitar"

var myFish = ['angel', 'clown', 'mandarin', 'sturgeon'];
var removed = myFish.splice(2, 0, 'drum', 'guitar');

// myFish is ["angel", "clown", "drum", "guitar", "mandarin", "sturgeon"] 
// removed is [], no elements removed

Example 4: Remove 1 element from index 3

var myFish = ['angel', 'clown', 'drum', 'mandarin', 'sturgeon'];
var removed = myFish.splice(3, 1);

// removed is ["mandarin"]
// myFish is ["angel", "clown", "drum", "sturgeon"]

Example 5: Remove 2 elements from index 2

var myFish = ['parrot', 'anemone', 'blue', 'trumpet', 'sturgeon'];
var removed = myFish.splice(myFish.length - 3, 2);

// myFish is ["parrot", "anemone", "sturgeon"] 
// removed is ["blue", "trumpet"]