Function iteratorFor

fetch.js:69–84

(items)

// Build a destructive iterator for the value list
function iteratorFor(items) {
  var iterator = {
    next: function() {
      var value = items.shift()
      return {done: value === undefined, value: value}
    }
  }

  if (support.iterable) {
    iterator[Symbol.iterator] = function() {
      return iterator
    }
  }

  return iterator
}

export function Headers(headers) {
  this.map = {}