const isCodeSandbox = 'SANDBOX_URL' in process.env || 'CODESANDBOX_HOST' in process.env export default { root: 'src/', publicDir: '../static/', base: './', server: { host: true, open: !isCodeSandbox // Open if it's not a CodeSandbox }, build: { outDir: '../dist', emptyOutDir: true, sourcemap: true } }