Last item in an array

Imagine we have a list of items and want to check the last one. Assume the list is the current subject of a Cypress chain of commands.

const list = [1, 2, 3]

We could grab the last item using the "traditional" index access

cy.wrap(list)
  .then((items) => {
    return items[items.length - 1]
  })
  .should('equal', 3)

We can grab the last item by invoking the Array's at method. By passing the -1 parameter, we get the last item.

cy.wrap(list)
  .then((items) => {
    return items.at(-1)
  })
  .should('equal', 3)
// better: invoke the "at" method using cy.invoke
// https://on.cypress.io/invoke
cy.wrap(list).invoke('at', -1).should('equal', 3)
// get the second to last item
cy.wrap(list).invoke('at', -2).should('equal', 2)

Cypress bundles Lodash library. We can use its _.last method to get the last item of a collection.

// get the last item using Lodash _.last method
cy.wrap(list).then(Cypress._.last).should('equal', 3)

Watch this recipe in the video Get The Last Item In An Array.