JavaScript - Delete Elements from an Index in JS Array

JavaScript - Delete Elements from an Index in JS Array

Last Updated : 14 Nov, 2024

These are the following ways to delete elements from a specified Index of JavaScript arrays:

1. Using splice() Method

The splice() method is used to remove elements directly from a specified index in an array by specifying the index and the number of elements to delete.

JavaScript

let a = [1, 2, 3, 4, 5];

// Start at index 2, delete 2 elements
a.splice(2, 2); 

console.log(a);

Output

[ 1, 2, 5 ]

2. Using slice() method

The slice() method creates a new array excluding the elements to be removed.

JavaScript

let a1 = [1, 2, 3, 4, 5];
let a2 = a1.slice(0, 2).concat(a1.slice(4));

console.log(a2);

Output

[ 1, 2, 5 ]

3. Using for loop

The for loop is used to loop through the elements and the elements next to the specified index moves to the left index overwriting the elements to be removed, then the length of the array is decreased using array.length.

JavaScript

let a = [1, 2, 3, 4, 5];
let x = 2;

for (let i = x; i < a.length - 1; i++) {
    a[i] = a[i + 1];
}
a.length -= 1;

console.log(a);

Output

[ 1, 2, 4, 5 ]

JavaScript - Delete Elements from an Index in JS Array

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