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{
  "scripts": {
    "start": "node server.js"
  }
}

npx create-react-app start

"scripts": {
  "start": "react-scripts start"
}

@ECHO off
GOTO start
:find_dp0
SET dp0=%~dp0
EXIT /b
:start
SETLOCAL
CALL :find_dp0
 
IF EXIST "%dp0%\node.exe" (
  SET "_prog=%dp0%\node.exe"
) ELSE (
  SET "_prog=node"
  SET PATHEXT=%PATHEXT:;.JS;=;%
)
 
endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\react-scripts\bin\react-scripts.js" %*
 

#!/usr/bin/env pwsh
$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
 
$exe=""
if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
  # Fix case when both the Windows and Linux builds of Node
  # are installed in the same directory
  $exe=".exe"
}
$ret=0
if (Test-Path "$basedir/node$exe") {
  # Support pipeline input
  if ($MyInvocation.ExpectingInput) {
    $input | & "$basedir/node$exe"  "$basedir/../react-scripts/bin/react-scripts.js" $args
  } else {
    & "$basedir/node$exe"  "$basedir/../react-scripts/bin/react-scripts.js" $args
  }
  $ret=$LASTEXITCODE
} else {
  # Support pipeline input
  if ($MyInvocation.ExpectingInput) {
    $input | & "node$exe"  "$basedir/../react-scripts/bin/react-scripts.js" $args
  } else {
    & "node$exe"  "$basedir/../react-scripts/bin/react-scripts.js" $args
  }
  $ret=$LASTEXITCODE
}
exit $ret

"scripts": {
  "start": "react-scripts start"
}

:find_dp0
SET dp0=%~dp0
EXIT /b

IF EXIST "%dp0%\node.exe" (
  SET "_prog=%dp0%\node.exe"
) ELSE (
  SET "_prog=node"
  SET PATHEXT=%PATHEXT:;.JS;=;%
)

"%_prog%" "%dp0%\..\react-scripts\bin\react-scripts.js" %*

'use strict';
 
// Makes the script crash on unhandled rejections instead of silently
// ignoring them. In the future, promise rejections that are not handled will
// terminate the Node.js process with a non-zero exit code.
process.on('unhandledRejection', (err) => {
  throw err;
});
 
const spawn = require('react-dev-utils/crossSpawn');
const args = process.argv.slice(2);
 
const scriptIndex = args.findIndex(
  (x) => x === 'build' || x === 'eject' || x === 'start' || x === 'test',
);
const script = scriptIndex === -1 ? args[0] : args[scriptIndex];
const nodeArgs = scriptIndex > 0 ? args.slice(0, scriptIndex) : [];
 
if (['build', 'eject', 'start', 'test'].includes(script)) {
  const result = spawn.sync(
    process.execPath,
    nodeArgs.concat(require.resolve('../scripts/' + script)).concat(args.slice(scriptIndex + 1)),
    { stdio: 'inherit' },
  );
  if (result.signal) {
    if (result.signal === 'SIGKILL') {
      console.log(
        'The build failed because the process exited too early. ' +
          'This probably means the system ran out of memory or someone called ' +
          '`kill -9` on the process.',
      );
    } else if (result.signal === 'SIGTERM') {
      console.log(
        'The build failed because the process exited too early. ' +
          'Someone might have called `kill` or `killall`, or the system could ' +
          'be shutting down.',
      );
    }
    process.exit(1);
  }
  process.exit(result.status);
} else {
  console.log('Unknown script "' + script + '".');
  console.log('Perhaps you need to update react-scripts?');
  console.log('See: https://facebook.github.io/create-react-app/docs/updating-to-new-releases');
}

const scriptIndex = args.findIndex(
  (x) => x === 'build' || x === 'eject' || x === 'start' || x === 'test',
);