sort two arrays

sortem.js

// input is two ascending sorted arrays
// output is the product of the two arrays sorted ascending

// inputs
const input1 = [1, 2, 3, 4, 99];
const input2 = [8, 10, 99, 101, 102];

// define variables needed in loop
let output = [];
let pointer1 = 0;
let pointer2 = 0;

// eslint-disable-next-line no-constant-condition
while (true) {
    /**
     * if either pointer has reached the end of their respective input
     * then we can take the remaining items in the other list and append it
     * to our output
     */
    if (pointer1 + 1 > input1.length) {
        output = [...output, ...input2.slice(pointer2)];
        break;
    } else if (pointer2 + 1 > input2.length) {
        output = [...output, ...input1.slice(pointer1)];
        break;
    }

    const value1 = input1[pointer1];
    const value2 = input2[pointer2];

    /**
     * find the smaller of the two pointer values and push to output
     * increment the respective pointer
     */
    if (value1 < value2) {
        output.push(value1);
        pointer1 += 1;
    } else if (value1 > value2) {
        output.push(value2);
        pointer2 += 1;
    } else {
        // we want both values in the output array if they are equal
        output.push(value1);
        output.push(value2);
        pointer1 += 1;
        pointer2 += 1;
    }
}

// [ 1, 2, 3, 4, 8, 10, 99, 99, 101, 102 ]
console.log(output);
return output;