index.d.ts

// load the global Cypress types
/// <reference types="cypress" />
// load the 3rd party command definition for cy.waitUntil()
/// <reference types="cypress-wait-until" />

// typically custom commands are added in this support folder
// so it makes sense to put their TypeScript definitions here
// from the JavaScript specs loads this file using
// the triple slash "reference" comment like this:
//
// /// <reference path="../support/index.d.ts" />

declare namespace Cypress {
  interface Chainable {
    /**
     * Custom command to select DOM element by data-cy attribute.
     * @example cy.dataCy('greeting')
     */
    dataCy(value: string): Chainable<Element>

    /**
     * Custom command that adds two given numbers
     */
    asyncAdd(a: number, b: number): Chainable<number>
  }
}