bahmutov / onbeforeunload-example

Cypress test for a site that uses onbeforeunload and a confirmation prompt

onbeforeunload-example

Cypress test for a site that uses onbeforeunload and a confirmation prompt

Read window.onbeforeunload and Cypress

Links

Original Cypress issue #2118

Install and use

• npm install
• npm run dev
• click on the spec, play with the cypress/integration tests and the application code.

Debugger protocol

In DevTools console you can execute the following code, but I did not see it cleanly remove all event listeners

getEventListeners(window).beforeunload
  .forEach(({ type, listener, useCapture }) => {
    console.log('removing', type, listener, useCapture)
    window.removeEventListener(type, listener, useCapture)
  })

Source