1234567891011121314151617181920
/** * Return flexbox spec versions by prefix */export default function (prefix) {  let spec;  if (prefix === "-webkit- 2009" || prefix === "-moz-") {    spec = 2009;  } else if (prefix === "-ms-") {    spec = 2012;  } else if (prefix === "-webkit-") {    spec = "final";  }
  if (prefix === "-webkit- 2009") {    prefix = "-webkit-";  }
  return [spec, prefix];}