VueJS - Scoped Styles

Using Scoped Styles in Components

Scoped styles in VueJS ensure that CSS styles are applied only to the specific component they are defined in. This prevents styles from leaking out and affecting other parts of the application. This guide covers how to use scoped styles in your VueJS components.

Defining Scoped Styles

To define scoped styles, add the scoped attribute to the <style> tag in your component:

// MyComponent.vue



                

Using Scoped Styles

Scoped styles ensure that the styles are applied only to the elements within the component. Here is an example:

// MyComponent.vue




// AnotherComponent.vue



                

Deep Selector

Sometimes you need to style elements that are deeper in the component tree. You can use the deep selector for this:

// MyComponent.vue




// ChildComponent.vue

                

Global Styles in Scoped Components

To include global styles in a component with scoped styles, you can add another <style> tag without the scoped attribute:

// MyComponent.vue





                

Best Practices

Follow these best practices when using scoped styles in VueJS:

• Use Scoped Styles for Component-Specific Styles: Use scoped styles for styles that are specific to a component to avoid style leaks.
• Combine Scoped and Global Styles: Combine scoped styles with global styles to maintain consistency across the application while keeping component styles isolated.
• Be Aware of Specificity: Be aware of CSS specificity and how it affects scoped styles, especially when using third-party libraries.
• Test Styles Thoroughly: Test your scoped styles to ensure they are applied correctly and do not affect other components.
• Document Style Scoping: Document the use of scoped styles in your components to improve code readability and maintainability.

Summary

This guide provided an overview of using scoped styles in VueJS, including defining scoped styles, using deep selectors, combining scoped and global styles, and best practices. By understanding and utilizing these techniques, you can create modular, maintainable, and isolated styles for your VueJS components.