Cypress Has a Free E2E Testing Framework — Visual Testing and Time Travel Debugging for Web Apps

Why Cypress? Cypress runs in the browser alongside your app — real DOM, real events, real network. Time-travel debugging shows every step visually. npm install cypress --save-dev npx cypress open Your First Test describe ( ' Login ' , () => { it ( ' should login successfully ' , () => { cy . visit ( ' /login ' ) cy . get ( ' #email ' ). type ( ' user@example.com ' ) cy . get ( ' #password ' ). type ( ' password123 ' ) cy . get ( ' button[type=submit] ' ). click () cy . url (). should ( ' include ' , ' /dashboard ' ) cy . contains ( ' Welcome ' ). should ( ' be.visible ' ) }) }) Network Stubbing cy . intercept ( ' GET ' , ' /api/users ' , { fixture : ' users.json ' }). as ( ' getUsers ' ) cy . visit ( ' /users ' ) cy . wait ( ' @getUsers ' ) cy . get ( ' .user-card ' ). should ( ' have.length ' , 3 ) Custom Commands Cypress . Commands . add ( ' login ' , ( email , password ) => { cy . session ([ email , password ], () => { cy . visit ( ' /login ' ) cy . get ( ' #email ' ). type ( email