@reduxjs/toolkit/src/query/utils/isAbsoluteUrl.ts

The official, opinionated, batteries-included toolset for efficient Redux development

/**
 * If either :// or // is present consider it to be an absolute url
 *
 * @param url string
 */

export function isAbsoluteUrl(url: string) {
  return new RegExp(`(^|:)//`).test(url)
}