Uploaded August 2023 | Updated September 2026, 1 week ago
This video teaches you two things:
- how to wait for the method to exist before spying on it
- how to start spying on the method _immediately_ when the application creates it.
Find the full recipe at glebbahmutov.com/cypress-examples/#spies-and-stubs
This video teaches you two things:
- how to wait for the method to exist before spying on it
- how to start spying on the method _immediately_ when the application creates it.
Find the full recipe at glebbahmutov.com/cypress-examples/#spies-and-stubs







![Dispatch Custom HTML Events From Cypress Tests
Sometimes an element on the page subscribes to custom events. You can dispatch events using plain HTML method el.dispatchEvent or by using Cypress command cy.trigger
cy.get(#signal).then(function ($el) {
$el[0].dispatchEvent(new CustomEvent(go))
})
// using cy.trigger
cy.get(#signal).trigger(warn)
Find the full example recipe at https://glebbahmutov.com/cypress-examples/ Dispatch Custom HTML Events From Cypress Tests](https://i.ytimg.com/vi/qCqzS3LtSeI/mqdefault.jpg)


