High Jump [JavaScript]

function highJump(input) {
    let neededHeight = Number(input[0]);

    let index = 1;

    let startingHeight = neededHeight - 30;
    let attempts = 0;
    let jumps = 0;

    while (startingHeight <= neededHeight) {
        let tempResult = Number(input[index]);

        if (tempResult > startingHeight) {
            startingHeight += 5;
            attempts = 0;
        } else {
            attempts++;
        }

        jumps++;

        if (attempts === 3) {
            break;
        }

        index++;
    }

    if (attempts === 3) {
        console.log(`Tihomir failed at ${startingHeight}cm after ${jumps} jumps.`);
    } else {
        console.log(`Tihomir succeeded, he jumped over ${neededHeight}cm after ${jumps} jumps.`);
    }
}