How To Append An Element To An Array In JavaScript? Example Tutorial

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This will change the original array
  1. const array = ['boy'];
  2. array.push('boy');
  3. array.splice(array.length, 0, 'boy');
  4. array[array.length] = 'boy';

Result

['boy', 'boy']

Non-Mutative

This will create a new array and the original array remains unchanged.

  1. const original = ['girl'];
  2. let newArray;
  3. newArray = original.concat('lady');
  4. newArray = [...original, 'lady'];

// Result

newArray; // ['girl', 'lady']

original; // ['girl']

3 Ways to Append Item to Array (Mutative)

Let's look at the 3 ways we can push an item to an array. This will be the mutative way, meaning it will change the original array.

Tag » How To Append An Array Java