What is a Vue Component
summary
Hands-on tour of Vue 3 components with concrete claims and tests: single-file components compile to render functions, reactivity uses ref and watchEffect, lifecycle hooks fire in child-before-parent order, and accessibility requires explicit labels (button aria-label "increase count"). Examples use Vue 3 Composition API and Cypress component tests (Cypress Testing Library, network intercepts). Behavior specifics: the counter emits "counted-to-five" at 5 and throws an error at 11, a parent fetches /people/1 and shows the result; tests stub the API or assert DOM changes.
AI-written summary · about
chapters (23)
- 0:00Introduction and speaker background
- 1:03What is a Vue component?
- 2:53Reusable chunk of frontend
- 5:24Simple paragraph component
- 7:11Component lifecycle basics
- 10:20Single file component compilation
- 11:03Counter component demo
- 13:53Accessibility and testing
- 17:24Counter with styles
- 20:18Reactivity system in Vue
- 20:39Paragraph with slots and props
- 26:45Component responsibilities
- 27:09Counter using paragraph
- 28:52Parent-child component lifecycle
- 30:37Counter emitting events
- 31:59Testing component events
- 37:03Fetch after counting to five
- 38:47Handling API responses
- 41:15Testing API-dependent components
- 49:23When to split components
- 50:46Component categories explained
- 53:12Design entities vs helpers
- 54:37Resources and Q&A
