# Copy sample extension locally
npx degit microsoft/vscode-webview-ui-toolkit-samples/frameworks/hello-world-react-cra hello-world
# Navigate into sample directory
cd hello-world
# Install dependencies for both the extension and webview UI source code
npm run install:all
# Build webview UI source code
npm run build:webview
# Open sample in VS Code
code .
Once the sample is open inside VS Code you can run the extension by doing the following:
Press F5 to open a new Extension Development Host window
Inside the host window, open the command palette (Ctrl+Shift+P or Cmd+Shift+P on Mac) and type Hello World (React + CRA): Show