diff --git a/packages/react-scripts/scripts/start.js b/packages/react-scripts/scripts/start.js index 7eb7ad464c0..3ff1b91f435 100644 --- a/packages/react-scripts/scripts/start.js +++ b/packages/react-scripts/scripts/start.js @@ -51,6 +51,21 @@ if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) { const DEFAULT_PORT = parseInt(process.env.PORT, 10) || 3000; const HOST = process.env.HOST || '0.0.0.0'; +if (process.env.HOST) { + console.log( + chalk.cyan( + `Attempting to bind to HOST environment variable: ${chalk.yellow( + chalk.bold(process.env.HOST) + )}` + ) + ); + console.log( + `If this was unintentional, check that you haven't mistakenly set it in your shell.` + ); + console.log(`Learn more here: ${chalk.yellow('http://bit.ly/2mwWSwH')}`); + console.log(); +} + // We attempt to use the default port but if it is busy, we offer the user to // run on a different port. `choosePort()` Promise resolves to the next free port. choosePort(HOST, DEFAULT_PORT)