Get text script

You can embed the data for test to use using <script type='text/plain'>...</script> tags. These tags will not be rended by the page (unless you set their style to be visible), but they are easy to query using the standard CSS selectors.

<script type="text/plain" id="name">
  Joe
</script>

cy.get('#name[type="text/plain"]').should('include.text', 'Joe')