experimental fetch polyfill locks a site visit

Cypress v4.9.0 with experimental fetch polyfill “true”

it('hangs forever', () => {
  cy.visit('https://one.clappia.com/', { timeout: 10000 })
  cy.get('#loginform > div:nth-child(8) > div > div > button').should('be.visible')
})

Note: the site has a redirect and bunch of canceled ajax calls normally, maybe there is something that locks up XMLHttpRequest polyfill?

[jennifer-shehane]

@SidharthLala1 This shouldn’t relate to your tests. I happened to be testing your application in the issue and accidentally had the experimentalFetchPolyfill configuration on when visiting the app and noticed the behavior was different with the experimental flag on. So, it was a bug that I forwarded to gleb that he then opened to investigate why your app would behave differently with this flag on.

It shouldn’t affect your testing since you do not use this experimental flag.

[jennifer-shehane]

experimentalFetchPolyfill has been deprecated in Cypress 6.0.0. We will not be addressing any new work on this feature. We encourage you to use cy.intercept() to intercept requests using the Fetch API instead.