Function subset

ranges/subset.js:45–71

(sub, dom, options = {})

// - Else return true

const subset = (sub, dom, options = {}) => {
  if (sub === dom) {
    return true
  }

  sub = new Range(sub, options)
  dom = new Range(dom, options)
  let sawNonNull = false

  OUTER: for (const simpleSub of sub.set) {
    for (const simpleDom of dom.set) {
      const isSub = simpleSubset(simpleSub, simpleDom, options)
      sawNonNull = sawNonNull || isSub !== null
      if (isSub) {
        continue OUTER
      }
    }
    // the null set is a subset of everything, but null simple ranges in
    // a complex range should be ignored.  so if we saw a non-null range,
    // then we know this isn't a subset, but if EVERY simple range was null,
    // then it is a subset.
    if (sawNonNull) {
      return false
    }
  }
  return true
}

const minimumVersionWithPreRelease = [new Comparator('>=0.0.0-0')]
const minimumVersion = [new Comparator('>=0.0.0')]