Vue.js DevTools

Renders a hierarchical tree view of the active Vue application's component structure, allowing developers to click through nested components and inspect their props, data, computed properties, and methods in real-time. The extension hooks into Vue's internal component registry via a bridge script injected into the page, enabling live traversal without requiring source map access or code instrumentation beyond Vue's built-in reactivity system.

Captures and displays the reactive state (data, computed properties, watchers) of selected components in real-time, with change history tracking that shows which properties mutated and when. The extension intercepts Vue's reactivity proxy layer to log state mutations as they occur, enabling developers to correlate UI changes with state changes without console.log debugging.

Displays component prop definitions (type, required, default value) and validates runtime prop values against their definitions, highlighting type mismatches or missing required props. The extension inspects component prop definitions from the component's props object and compares runtime values against expected types, displaying validation errors in the DevTools panel.

Provides a dedicated inspector for Vuex store state with mutation history replay, allowing developers to step backward and forward through state mutations and inspect the store at any point in time. The extension subscribes to Vuex's mutation stream and maintains an immutable history of state snapshots, enabling time-travel debugging by replaying mutations in sequence.

Provides a dedicated inspector for Pinia store state with real-time mutation tracking and replay capability, designed for Vue 3's modern state management. The extension hooks into Pinia's subscription API to track state changes and actions, displaying store state with full mutation history and the ability to step through state changes chronologically.

Displays the Vue Router route configuration as a tree or graph, showing all defined routes, their parameters, and navigation history. The extension subscribes to Vue Router's navigation guards and history stack, displaying the current route, route parameters, query strings, and a chronological log of all route transitions with their triggers and timing.

Records component render times, lifecycle hook execution duration, and event handler performance during application runtime, displaying results in a timeline view with flame graphs and performance metrics. The extension uses Vue's performance hooks (or browser Performance API) to measure component initialization, update, and unmount phases, correlating performance data with component names and user interactions.

Captures all custom events emitted by components and displays them in a chronological log with event names, payloads, and source/target components. The extension subscribes to Vue's event system and records each emit with timestamp and context, allowing developers to replay events in sequence or jump to a specific point in the event timeline to inspect application state at that moment.

Enables developers to click on a DOM element in the page and instantly highlight the corresponding Vue component in the component tree, showing the component's props, data, and source file location. The extension injects a picker tool that intercepts click events on DOM elements, traces them back to their Vue component using Vue's internal component registry, and highlights the component in the DevTools panel.

Provides a plugin system that allows library authors and developers to extend DevTools with custom inspectors, actions, and integrations. The plugin API exposes hooks for registering custom inspectors (e.g., for custom state management libraries), adding custom actions to the DevTools UI, and subscribing to DevTools events (component selection, state changes, navigation).

Displays the source file location (file path and line number) for selected components and enables one-click navigation to the component source code in the IDE. The extension uses source maps to map compiled component code back to source files, and provides IDE integration hooks (e.g., VS Code) to open files directly from DevTools.