refactor: Migrate <Routes /> to react-router v6
#35030
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…#33276) <!-- Please submit this PR as a draft initially. Do not mark it as "Ready for review" until the template has been completely filled out, and PR status checks have passed at least once. --> ## Note for Reviewers The bulk of the changes in this PR are in [`ui/pages/routes/routes.component.tsx`](https://github.com/MetaMask/metamask-extension/pull/33276/files#diff-41292899566e5a4241f4b8297aeb1a00057fc694d72ff12a3d9b7102252f59dd). Unfortunately, GitHub is failing to recognize that this file was renamed from [`ui/pages/routes/routes.component.js`](https://github.com/MetaMask/metamask-extension/pull/33276/files#diff-10975e6333c4f017e6def2e4c715c3efd9a92c87f9fa24f105598f101ad66738), even with a `git mv` commit establishing this fact: 1f91b8c. - For a side-by-side diff of the two files, you can go to https://www.diffchecker.com/eITwpTzt/ or https://diffy.org/diff/d177f182ccb97. - This issue is also contributing to the PR exceeding our maximum LoC limit, because all of the lines in `routes.component.tsx` file (751 lines) are being counted as additions, instead of just the changed lines (454 lines). ## **Motivation** The `<Routes />` component handles routing and navigation between our application's pages and url paths. Despite its importance, it remains written in JavaScript as a class component, and relies on a HOC for access to Redux state properties and actions, all of which are outdated patterns. ## **Description** This commit achieves the following: 1. Migrate `<Routes />` into a functional component that uses hooks, and can directly interface with the Redux store using selectors and dispatched actions. 2. Migrate `<Routes />` to strict TypeScript. 3. Adds `useAppSelector`, a typed version of the `useSelector` hook, to `ui/store/store.ts`. These changes represent a significant improvement in maintainability, type safety, and future extensibility. This migration also unblocks the `react-router` v6 upgrade effort, which requires class components to be converted to functional components. ## **Related issues** - Requirement for [react-router v6 upgrade](MetaMask/MetaMask-planning#3261) - ~See #31459 - Contributes to MetaMask/MetaMask-planning#5477 - Closes MetaMask/MetaMask-planning#5478 - Followed by #35030 ## **Manual testing steps** 1. After installing, check whether all steps of the onboarding flow load and display without issue. 2. Verify that pages (e.g. Settings) load and display without issue. ## **Screenshots/Recordings** <!-- If applicable, add screenshots and/or recordings to visualize the before and after of your change. --> ### **Before** <!-- [screenshots/recordings] --> ### **After** <!-- [screenshots/recordings] --> ## **Pre-merge author checklist** - [x] I've followed [MetaMask Contributor Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Extension Coding Standards](https://github.com/MetaMask/metamask-extension/blob/main/.github/guidelines/CODING_GUIDELINES.md). - [x] I've completed the PR template to the best of my ability - [x] I’ve included tests if applicable - [x] I’ve documented my code using [JSDoc](https://jsdoc.app/) format if applicable - [x] I’ve applied the right labels on the PR (see [labeling guidelines](https://github.com/MetaMask/metamask-extension/blob/main/.github/guidelines/LABELING_GUIDELINES.md)). Not required for external contributors. ## **Pre-merge reviewer checklist** - [ ] I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed). - [ ] I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.
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August 13, 2025 03:05
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<Routes />into a TypeScript functional component #33276Manual testing steps
Screenshots/Recordings
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After
Pre-merge author checklist
Pre-merge reviewer checklist