cy-stripe.js

cypress-stripe.js

// cypress.json
{
  "chromeWebSecurity": false
}

//test.spec.js

/// <reference types="cypress" />

context('Actions', () => {
  describe(`Stripe`, () => {
    it(`fill inputs`, () => {
      cy.visit(`https://stripe.dev/elements-examples/`);
      cy.get(".__PrivateStripeElement > iframe").then($iframe => {
        const $body = $iframe.contents().eq(0).find("body");
        cy.wrap($body)
          .find("input[placeholder='Card number']")
          .type("4242424242424242");
        cy.wrap($body)
          .find("input[placeholder='MM / YY']")
          .type("1222");
        cy.wrap($body)
          .find("input[placeholder='CVC']")
          .type("123");
      });
    });
  });
})