Lightning Aura Components Developer Guide
jComponent Bundles
A component bundle contains a component or an app and all its related
resources.
| Resource | Resource Name | Usage | See Also |
|---|---|---|---|
| Component or Application | sample.cmp or sample.app | The only required resource in a bundle. Contains markup for the component or app. Each bundle contains only one component or app resource. | Creating Components |
| CSS Styles | sample.css | Contains styles for the component. | CSS in Components |
| Controller | sampleController.js | Contains client-side controller methods to handle events in the component. | Handling Events with Client-Side Controllers |
| Design | sample.design | File required for components used in Lightning App Builder, Lightning pages, Experience Builder, or Flow Builder. | Aura Component Bundle Design Resources |
| Documentation | sample.auradoc | A description, sample code, and one or multiple references to example components | Writing Documentation for the Component Library |
| Renderer | sampleRenderer.js | Client-side renderer to override default rendering for a component. | Create a Custom Renderer |
| Helper | sampleHelper.js | JavaScript functions that can be called from any JavaScript code in a component’s bundle | Sharing JavaScript Code in a Component Bundle |
| SVG File | sample.svg | Custom icon resource for components used in the Lightning App Builder or Experience Builder. | Configure Components for Lightning Pages and the Lightning App Builder |
All resources in the component bundle follow the naming convention and are auto-wired. For example, a controller <componentName>Controller.js is auto-wired to its component, which means that you can use the controller within the scope of that component.
File-Size Limits
Each resource, such as a cmp, css, or js file, in an Aura component bundle has a maximum file size of 1,000,000 bytes. However, for performance reasons, we recommend that you don’t exceed a maximum file size of 128 KB (131,072 bytes).