vueplug-typer/src/utils/random-int.ts

Vue component that simulates a user typing, selecting, and erasing text.

function validNumber(val) {
  return typeof val === "number" && !Number.isNaN(val) && Number.isFinite(val);
}

function validRange(lower, upper) {
  return validNumber(lower) && validNumber(upper) && lower <= upper;
}

/**
 * @param min - Minimum random int
 * @param max - Maximum random int
 * @returns a random int in the range [min, max], or -1 if either of the following conditions are met:
 *  - min and/or max are not of type 'number', NaN, or Infinity
 *  - min > max
 */
export default (min, max) => {
  if (!validRange(min, max)) {
    return -1;
  }

  // Since we're generating random integers, rounded the arguments to the closest int within the range
  min = Math.ceil(min);
  max = Math.floor(max);

  return Math.floor(Math.random() * (max - min + 1)) + min;
};