Dependency injection manages component dependencies. Handle injection patterns. Support service location. Implement injection strategies.
Context is set using setContext function from svelte. Example: setContext('key', value). Must be called during component initialization. Value can be any type including functions.
Context exists throughout component lifecycle. Created during initialization. Available until component destruction. Cannot be changed after initialization. New values require component reinitialization.
Context error handling manages error states. Handle missing context. Support error recovery. Implement error boundaries.
Context testing verifies context behavior. Handle test isolation. Support integration testing. Implement test utilities.
Context versioning handles API changes. Implement version migration. Support backwards compatibility. Manage version state.
Context debugging tracks context issues. Handle debugging tools. Support state inspection. Implement debug logging.
Type safety ensures correct context usage. Handle TypeScript integration. Support type checking. Implement type definitions.
Context keys must be unique within component tree. Often use symbols for guaranteed uniqueness. Example: const key = Symbol(). Prevents key collisions between different contexts.
Functions can be shared through context. Example: setContext('api', { method: () => {} }). Allows child components to access shared methods. Supports dependency injection pattern.
Context is static, set during initialization. Stores are reactive, can change over time. Context good for static values/dependencies. Stores better for changing state.
Context dependencies manage relationships between contexts. Handle dependency order. Support circular dependencies. Implement dependency resolution.
The Context API allows passing data through the component tree without prop drilling. Uses setContext and getContext functions. Context is available to component and its descendants. Useful for sharing data/functionality.
Context is retrieved using getContext function. Example: const value = getContext('key'). Must use same key as setContext. Available in component and child components.
Context is scoped to component and descendants. Not available to parent or sibling components. Multiple instances create separate contexts. Follows component hierarchy.
getContext returns undefined if context not found. Should handle undefined case. Can provide default values. Consider error handling for required context.
Context patterns include provider components, dependency injection, service locator. Handle context composition. Support context inheritance. Implement context strategies.
Context updates require component reinitialization. Can combine with stores for reactive updates. Handle update propagation. Manage update lifecycle.
