Support more modern JavaScript syntax

Fixes #5

Author: sindresorhus

index.js

@@ -1,15 +1,20 @@
-import esprima from 'esprima';
+import {parse} from '@babel/parser';
 import {gulpPlugin} from 'gulp-plugin-extras';
 
 export default function gulpJsValidate({module: useModule = true} = {}) {
-	const parse = useModule ? esprima.parseModule : esprima.parseScript;
-
 	return gulpPlugin('gulp-jsvalidate', file => {
-		const {errors} = parse(file.contents.toString(), {tolerant: true});
+		try {
+			parse(file.contents.toString(), {
+				sourceType: useModule ? 'module' : 'script',
+				sourceFilename: file.basename,
+			});
+		} catch (error) {
+			if (error instanceof SyntaxError) {
+				const formattedError = new Error(`\n${error.message}`);
+				formattedError.isPresentable = true;
+				throw formattedError;
+			}
 
-		if (errors.length > 0) {
-			const error = new Error(`\n${errors.join('\n')}`);
-			error.isPresentable = true;
 			throw error;
 		}
 

package.json

@@ -12,6 +12,7 @@
 	},
 	"type": "module",
 	"exports": "./index.js",
+	"sideEffects": false,
 	"engines": {
 		"node": ">=18"
 	},
@@ -36,15 +37,15 @@
 		"code"
 	],
 	"dependencies": {
-		"esprima": "^4.0.1",
-		"gulp-plugin-extras": "^0.2.2"
+		"@babel/parser": "^7.25.3",
+		"gulp-plugin-extras": "^1.0.0"
 	},
 	"devDependencies": {
-		"ava": "^5.3.1",
-		"gulp": "^4.0.2",
-		"p-event": "^6.0.0",
+		"ava": "^6.1.3",
+		"gulp": "^5.0.0",
+		"p-event": "^6.0.1",
 		"vinyl": "^3.0.0",
-		"xo": "^0.56.0"
+		"xo": "^0.59.3"
 	},
 	"peerDependencies": {
 		"gulp": ">=4"

test.js

@@ -9,17 +9,19 @@ test('main', async t => {
 	const errorPromise = pEvent(stream);
 
 	stream.end(new Vinyl({
-		contents: Buffer.from('const foo = \'bar;'),
+		path: import.meta.url,
+		contents: Buffer.from('const foo = \'bar;\nlet undefinedVariable;undefinedVariable ??= \'Hello\';'),
 	}));
 
-	await t.throwsAsync(errorPromise, {message: /Unexpected token/});
+	await t.throwsAsync(errorPromise, {message: /Unterminated string constant/});
 });
 
 test('supports `import`', async t => {
 	const stream = gulpJsvalidate();
 	const errorPromise = pEvent(stream, 'data');
 
 	stream.end(new Vinyl({
+		path: import.meta.url,
 		contents: Buffer.from('import foo from \'foo\';'),
 	}));