function checkSyntax(source, filename) {
// Remove Shebang.
source = stripShebang(source);
// This has to be done after prepareMainThreadExecution because it
// relies on process.execPath
const CJSModule = require('internal/modules/cjs/loader');
const { getOptionValue } = require('internal/options');
const experimentalModules = getOptionValue('--experimental-modules');
if (experimentalModules) {
let isModule = false;
if (filename === '[stdin]' || filename === '[eval]') {
isModule = getOptionValue('--entry-type') === 'module';
} else {
const resolve = require('internal/modules/esm/default_resolve');
const { format } = resolve(pathToFileURL(filename).toString());
isModule = format === 'module';
}
if (isModule) {
const { ModuleWrap } = internalBinding('module_wrap');
new ModuleWrap(source, filename);
return;
}
}
// Remove BOM.
source = stripBOM(source);
// Wrap it.
source = CJSModule.wrap(source);
// Compile the script, this will throw if it fails.
new vm.Script(source, { displayErrors: true, filename });
}
() => resolve('target', undefined),