Cypress access to an iframe into another iframe

Question

I am trying to find a solution to access to an iframe into an iframe using cypress. I have already tried all the following function without success:

Cypress.Commands.add('getIframeBody', (iframeSelector) => {
    // get the iframe > document > body
    // and retry until the body element is not empty
    return cy
    .get(iframeSelector)
    .its('0.contentDocument.body').should('not.be.empty')
    // wraps "body" DOM element to allow
    // chaining more Cypress commands, like ".find(...)"
    // https://on.cypress.io/wrap
    .then(cy.wrap)
  })

Cypress.Commands.add('iframev3', { prevSubject: 'element' }, (iframeSelector, callback) => {
    // For more info on targeting inside iframes refer to this GitHub issue:
    // https://github.com/cypress-io/cypress/issues/136
    cy.log('Getting iframe body')

    return cy
        .get(iframeSelector)
        .wrap($iframe)
        .should(iframe => expect(iframe.contents().find('body')).to.exist)
        .then(iframe => cy.wrap(iframe.contents().find('body')))
        .within({}, callback)
})

Cypress.Commands.add('iframeV4', { prevSubject: 'element' }, $iframe => {
    return new Cypress.Promise(resolve => {
        $iframe.ready(function() {
          resolve($iframe.contents().find('body'));
        });
    });
  });

I have also tried the iframe plugin.

And I try to access it with this method for example:

cy.get('#m_c_layoutElem_cmsdesktop').iframeV4()
        .get('#m_c_layoutElem_contentview', {timeout: 10 * 1000}).iframeV4().debug()

But it is always the same I am able to grab the first iframe but not the second one!

REgards,

EDIT: Thanks to the current comments I have advance a little bit and here is the current state:

cy.getIframeBody('#m_c_layoutElem_cmsdesktop')
        .then(iframe1 => {   
            let iframe2 = iframe1.find('#m_c_layoutElem_contentview')[0]   //Do stuff with queryselector()   
            console.log(iframe2);
            let iframe3 = iframe2.contentWindow.document.querySelector('#m_c_plc_lt_ctl00_HorizontalTabs_l_c');
            console.log('iframe3', iframe3) // This is set to an iframe
            console.log(iframe3.contentWindow) //This is null
            //debugger

            /*let cyIframe3 = Cypress.$(iframe3.contentWindow.document);
            console.log('cy iframe3', cyIframe3);
*/            
            let cyIframe32 = cy.get(iframe3);
            console.log('cy iframe32', cyIframe32); //This is: $Chainer {userInvocationStack: "    at Context.eval (http://localhost:8090/__cypress/tests?p=cypress\support\index.js:237:25)", specWindow: Window, chainerId: "chainer1656", firstCall: false, useInitialStack: false}

            /*let field = iframe3.contentWindow.document.querySelector('#m$c$f$Title$txtText'); // Exception because iframe3.contentWindow is null
            console.log(field);
*/
            iframe3.find('#m$c$f$Title$txtText').type('Coucou'); //fin is not a function
        });

Answer 1

Don't know if this is going to help you or if you already fixed it, but I did find a solution to access an iframe inside another iframe, cause I was trying to solve that issue for myself, will leave the answer here hope it can help.

So an example of the id of the iframes:

• Iframe1, id='first_iframe"
• Iframe2, id='second_iframe"

To enter in the first iframe, you can do it like this:

cy.get('#first_iframe").then(($firstIframe)=> {
  
  const $secondIframeReference = $firstIframe.contents().find('#second_iframe');
  
  cy.wrap($secondIframeReference).as('secondIframeReference'); //Saving this as a reference so we can access it again using get command
  
  //Now we are accessing the second iframe
  cy.get('@secondIframeReference').then(($secondIframe) => {
    
    const $elementYouWant = $secondIframe.contents().find('element you want to interact with');
    
    cy.wrap('$secondIframeBody').type('It's writing some stuff'); //In case it is an input field, for example
    
  });
});

Got into this solution after reading this article

Answer 2

It is very simple. There are two ways. (Following are Real reproducible examples)

it("Using 'contentDocument' property and its() - Nested iFrames", function() {
        cy.visit("https://www.play1.automationcamp.ir/frames.html")
        cy.get("#frame1")
            .its('0.contentDocument')
            .its('body')
            .find("#frame2")
            .its('0.contentDocument')
            .its('body')
            .find("#click_me_2").click()

    })
    
it("Using yielded jQuery element - Nested iFrames", function() {
        cy.visit("https://www.play1.automationcamp.ir/frames.html")
        cy.get("#frame1").then(function($iFrame1){
            const iframe2 = $iFrame1.contents().find('#frame2')
            cy.wrap(iframe2).as('iframe2Ref')
            cy.get('@iframe2Ref').then(function($iFrame2){
                const iFrame2Contents = $iFrame2.contents().find('body')
                cy.wrap(iFrame2Contents).find("#click_me_2").click()
            })
        })
    })