Merge Sorted Array

function mergeSortedArray(array1,array2){
    const mergedArray=[];
    let i=0;
    let j=0;
    if(array1.length === 0) {
    return array2;
  }
    if(array2.length === 0) {
    return array1;
  }
    while(array1[i] || array2[j]){
        if(!array2[j]||array1[i]<array2[j]){
            mergedArray.push(array1[i]);
            i++;
        }
        else{
            mergedArray.push(array2[j]);
            j++;
        }
    }
    return mergedArray;
}



const data=mergeSortedArray([4,8,12],[4,6,32]);
console.log('merged array is',data);