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The `styles:dev` step of the development build was broken in #9568 when the `lockdown()` function from SES was introduced. One of the effects of `lockdown()` is preventing the use of `RegExp.lastMatch`, which is relied upon by `postcss` for parsing inline sourcemaps. This problem has been worked around by re-arranging the build pipeline for styles. Firstly, the `autoprefixer` stage was moved _before_ sourcemaps were generated. Its placement _after_ sourcemaps was a mistake in the first place - it should have always been before they were written, so that the sourcemaps could keep track of the changes made by `autoprefixer`. Second, the `-rtl` sourcemap generation was moved to a separate build pipeline. The `rtl` stage also uses `postcss`, and it must come after the sourcemaps are written for the non-RTL styles, so splitting it into a separate build was the only way to avoid passing in inline sourcemaps. This does make the build slightly slower, but it also decreases the size of the RTL sourcemaps dramatically.
MetaMask Browser Extension
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Building locally
- Install Node.js version 10
- If you are using nvm (recommended) running
nvm usewill automatically choose the right node version for you.
- If you are using nvm (recommended) running
- Install Yarn
- Install dependencies:
yarn - Copy the
.metamaskrc.distfile to.metamaskrc- Replace the
INFURA_PROJECT_IDvalue with your own personal Infura Project ID. - If debugging MetaMetrics, you'll need to add a value for
SEGMENT_WRITE_KEYSegment write key.
- Replace the
- Build the project to the
./dist/folder withyarn dist. - Optionally, to start a development build (e.g. with logging and file watching) run
yarn startinstead.- To start the React DevTools and Redux DevTools Extension
alongside the app, use
yarn start:dev.- React DevTools will open in a separate window; no browser extension is required
- Redux DevTools will need to be installed as a browser extension. Open the Redux Remote Devtools to access Redux state logs. This can be done by either right clicking within the web browser to bring up the context menu, expanding the Redux DevTools panel and clicking Open Remote DevTools OR clicking the Redux DevTools extension icon and clicking Open Remote DevTools.
- You will also need to check the "Use custom (local) server" checkbox in the Remote DevTools Settings, using the default server configuration (host
localhost, port8000, secure connection checkbox unchecked)
- You will also need to check the "Use custom (local) server" checkbox in the Remote DevTools Settings, using the default server configuration (host
- To start the React DevTools and Redux DevTools Extension
alongside the app, use
Uncompressed builds can be found in /dist, compressed builds can be found in /builds once they're built.
Contributing
Running Tests
Run tests with yarn test.
You can also test with a continuously watching process, via yarn watch.
You can run the linter by itself with yarn lint.
Architecture
Development
yarn
yarn start
Build for Publishing
yarn dist