getNextMultiple() — Finds the smallest multiple of `multipleOf` that is greater than or equal to `baseValue + offset`.

getNextMultiple.js

/**
 * Finds the smallest multiple of `multipleOf` that is greater than or equal to
 * `baseValue + offset`.
 *
 * @param {number} multipleOf
 *   The number whose multiple needs to be found.
 * @param {number} baseValue
 *   The base value to start from.
 * @param {number} [offset=0]
 *   The optional value to add to `baseValue` (default is 0).
 * @returns {number}
 *   The smallest multiple of `multipleOf` that is greater than or equal to
 *   `baseValue + offset`.
 */
function getNextMultiple(multipleOf, baseValue, offset = 0) {
    return Math.ceil((baseValue + offset) / multipleOf) * multipleOf;
}