midVue.js
Explain Scoped CSS in Vue.
Updated May 4, 2026
Short answer
The scoped attribute ensures that CSS in a component only applies to that component's elements.
Deep explanation
Vue achieves this by adding a unique attribute (like data-v-f3f3eg) to the component's elements and appending that attribute selector to the CSS rules. This prevents style leakage between components.
Real-world example
Defining a .title class in multiple components without them overriding each other's colors or fonts.
Common mistakes
- Trying to style a child component's root element from a parent (requires the `:deep()` selector).
Follow-up questions
- How do you target global styles from a scoped block?