index.js
function contentRange (type, size, range) {
  return type + ' ' + (range ? range.start + '-' + range.end : '*') + '/' + size
}
function contentRange (type, size, range) {
  return type + ' ' + (range ? range.start + '-' + range.end : '*') + '/' + size
}
function contentRange ( type , size , range ) { return type + ' ' + ( range ? range . start + '-' + range . end : '*' ) + '/' + size }
Create a Content-Range header.

@param {string} type
@param {number} size
@param {array} [range]
Create a Content - Range header .