railwaysystem/RuoYi-Vue/ruoyi-ui/node_modules1/@vue/cli-service/lib/util/isAbsoluteUrl.js

module.exports = function isAbsoluteUrl (url) {
  // A URL is considered absolute if it begins with "<scheme>://" or "//"
  return /^([a-z][a-z\d\+\-\.]*:)?\/\//i.test(url)
}