JSFiddle - React, Tailwind, and code Playground

JavaScript

const authorisationSettings = {
  get code() {
    return sessionStorage.getItem('authorisationCode');
  },
  set code(value) {
    return sessionStorage.setItem('authorisationCode', value);
  }
};

function saveAuthorisationCode( code ) {
  authorisationSettings.code = code;
}

saveAuthorisationCode( 'test' );
console.log( authorisationSettings.code );