declare namespace Cypress { interface Chainable { getTableRowByIndex : typeof getTableRowByIndex; } } /*************************************** get table row by table id and index *************************************/ function getTableRowByIndex(id : string, index : number) : Chainable> { return cy.get('table#' + id + ' tbody tr').eq(index); } Cypress.Commands.add('getTableRowByIndex', getTableRowByIndex);