plugin-react-refresh requires Node 14.0.0

[hmaurer]

I don't know if this classifies as a bug or as an enhancement.

Describe the bug

A recent commit on plugin-react-refresh introduced a use of optional chaining, which requires Node 14+. Vite's documentation specifies that Node 12+ is required. This may be true for Vite itself but isn't true anymore for Vite React projects.

Reproduction

Initialize a vitejs project with plugin-react-refresh 1.2.0 on Node 12.x, run npm run dev, and observe:

/node_modules/@vitejs/plugin-react-refresh/index.js:81
          plugins: opts?.parserPlugins
                        ^

SyntaxError: Unexpected token '.'

Potential fixes

• Update documentation to indicate that Node 14+ is required for Vite React projects
• OR remove the use of optional chaining
• OR switch plugin-react-refresh to TypeScript so optional chaining gets transpiled

System Info

• vite version: 2.0.0-beta.61
• Operating System: MacOS Catalina
• Node version: v12.18.4
• Package manager (npm/yarn/pnpm) and version: NPM v6.14.6

[hmaurer]

PS: are PRs for things like this welcome?

[yyx990803]

I forgot this file is un-transpiled!