/** @returns {number[]} */
const parseImplicantString = (str) => {
  if (str.indexOf('-') > -1) {
    return [
      ...parseImplicantString(str.replace('-', 0)),
      ...parseImplicantString(str.replace('-', 1)),
    ];
  } else {
    return [parseInt(str, 2)];
  }
};

console.log(parseImplicantString('-100')); // => [4, 12]
console.log(parseImplicantString('10--')); // => [8, 9, 10, 11]
console.log(parseImplicantString('1--0')); // => [8, 10, 12, 14]
console.log(parseImplicantString('1-1-')); // => [10, 11, 14, 15]