sweetalert2/src/utils/defaultInputValidators.js

A beautiful, responsive, customizable and accessible (WAI-ARIA) replacement for JavaScript's popup boxes, supported fork of sweetalert

export default {
  email: (string, extraParams) => {
    return /^[a-zA-Z0-9.+_-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9-]{2,24}$/.test(string)
      ? Promise.resolve()
      : Promise.reject(extraParams && extraParams.validationMessage ? extraParams.validationMessage : 'Invalid email address')
  },
  url: (string, extraParams) => {
    // taken from https://stackoverflow.com/a/3809435/1331425
    return /^https?:\/\/(www\.)?[-a-zA-Z0-9@:%._+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_+.~#?&//=]*)$/.test(string)
      ? Promise.resolve()
      : Promise.reject(extraParams && extraParams.validationMessage ? extraParams.validationMessage : 'Invalid URL')
  }
}