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How to resolve - Cypress detected a cross origin error?

Cypress detects a cross-origin error when your test attempts to interact with a web page from a different domain than the one your Cypress test is active on. This issue arises due to the browser's Same-Origin Policy, which restricts how documents or scripts loaded from one origin can interact with resources from another origin.
To resolve this error, consider the following strategies:

Understanding Cross-Origin Errors

Cross-origin errors typically occur in scenarios such as:

  • Direct Cross-Origin Requests: Attempting to access a site hosted on a different domain.
  • Opening New Tabs or Windows: Interacting with content from a different domain in new tabs.
  • Iframes: Engaging with iframes that contain content from another domain.
  • Cross-Origin Scripting: Loading scripts or assets from different domains.

Solutions to Resolve Cross-Origin Errors

  1. Use cy.origin(): The most effective way to handle cross-origin interactions in Cypress is by using the cy.origin() command. This command allows you to specify which origin the subsequent commands should run against. For example: 
   it('navigates to example.cypress.io and runs additional commands', () => {
       cy.visit('http://localhost:3000');
       cy.origin('https://example.cypress.io', () => {
           cy.get('h1').should('contain', 'Why Cypress?');
       });
   });
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This approach ensures that commands targeting elements on the specified origin are executed within that context, thus avoiding cross-origin errors.

  1. Split Tests by Origin: If your tests involve multiple domains, consider splitting them into separate tests. Cypress allows you to visit different origins in different tests without needing cy.origin(). For instance: 
   it('navigates to cypress.io', () => {
       cy.visit('https://www.cypress.io');
   });

   it('navigates to npmjs.com', () => {
       cy.visit('https://www.npmjs.com');
   });
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  1. Mock Cross-Origin Requests:
    Use cy.route() or cy.intercept() to mock network requests to external domains. This allows you to simulate responses without making actual cross-origin requests, which can help avoid errors during testing.

  2. Review Cypress Version:
    Ensure you are using an updated version of Cypress. As of version 12.0.0, Cypress introduced enhanced capabilities for handling multiple domains within a single test, reducing the likelihood of encountering cross-origin errors.

By implementing these strategies, you can effectively manage cross-origin interactions in your Cypress tests, ensuring smoother execution and accurate testing outcomes.-Powered By Hexadecimal Software Pvt. Ltd.

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