mergo two arrays in javascript

To merge two arrays in javascript, there are multiple ways to achieve that:

1. Using concat() method:

   The concat() method is used to merge two or more arrays into a new array.

   index.tsx
   const arr1 = [1, 2, 3];
   const arr2 = [4, 5, 6];
   
   const mergedArray = arr1.concat(arr2);
   console.log(mergedArray); // Output: [1, 2, 3, 4, 5, 6]
   144 chars
   6 lines

2. Using spread operator (...) :

   We can use the spread operator (...) to merge two arrays into a new array.

   index.tsx
   const arr1 = [1, 2, 3];
   const arr2 = [4, 5, 6];
   
   const mergedArray = [...arr1, ...arr2];
   console.log(mergedArray); // Output: [1, 2, 3, 4, 5, 6]
   145 chars
   6 lines

Both of these methods will result in a new array that contains all the elements from both arrays.