In this example on the website, they say there is a simple way to use data you create in before() or beforeEach() in a testcase it(). But when I tried it it said my this.variable was undefined. After a little more searching I found that all aliases are cleared before each test, making the example on the website not possible.

Example on the website under Sharing context:

describe('parent', () => {
  beforeEach(() => {
    cy.wrap('one').as('a')
  })

  context('child', () => {
    beforeEach(() => {
      cy.wrap('two').as('b')
    })

    describe('grandchild', () => {
      beforeEach(() => {
        cy.wrap('three').as('c')
      })

      it('can access all aliases as properties', function () {
        expect(this.a).to.eq('one') // true
        expect(this.b).to.eq('two') // true
        expect(this.c).to.eq('three') // true
      })
    })
  })
})

Briefly what I’m trying to do (I thought the way I get my data irrelevant to the question):

describe('myTests', () => {
  beforeEach(() => {
    // producing data resulting in a jquery list element
    cy.wrap($element).as('element')
  })

  it('firstTest', function () {
    this.element.click()
  })
}

This results on a TypeError (void 0) is undefined with an error to the beginning of this