chore: convert to esbuild (#2579)

* chore: convert to esbuild

* chore: convert to esbuild

* fix merge

* remove dep

* async

* done on error

Gruntfile.js

@@ -1,22 +1,8 @@
-var path = require('path');
-
 /*eslint
 camelcase: ["error", {"properties": "never"}]
 */
 var testConfig = require('./build/test/config');
 
-function createWebpackConfig(input, output, outputFilename = 'index.js') {
-	return {
-		devtool: false,
-		mode: 'development',
-		entry: path.resolve(__dirname, input),
-		output: {
-			filename: outputFilename,
-			path: path.resolve(__dirname, output)
-		}
-	};
-}
-
 module.exports = function(grunt) {
 	'use strict';
 
@@ -29,7 +15,6 @@ module.exports = function(grunt) {
 	grunt.loadNpmTasks('grunt-contrib-watch');
 	grunt.loadNpmTasks('grunt-parallel');
 	grunt.loadNpmTasks('grunt-run');
-	grunt.loadNpmTasks('grunt-webpack');
 	grunt.loadTasks('build/tasks');
 
 	var langs;
@@ -134,21 +119,19 @@ module.exports = function(grunt) {
 						dest: 'axe' + lang + '.js'
 					};
 				})
-			},
-			commons: {
-				src: [
-					'lib/commons/intro.stub',
-
-					// output of webpack directories
-					'tmp/commons/index.js',
-
-					'lib/commons/outro.stub'
-				],
-				dest: 'tmp/commons.js'
 			}
 		},
-		webpack: {
-			core: createWebpackConfig('lib/core/core.js', 'tmp/core', 'core.js')
+		esbuild: {
+			core: {
+				files: [
+					{
+						expand: true,
+						cwd: 'lib/core',
+						src: ['core.js'],
+						dest: 'tmp/core'
+					}
+				]
+			}
 		},
 		'aria-supported': {
 			data: {
@@ -359,11 +342,11 @@ module.exports = function(grunt) {
 		}
 	});
 
-	grunt.registerTask('translate', ['validate', 'webpack', 'add-locale']);
+	grunt.registerTask('translate', ['validate', 'esbuild', 'add-locale']);
 	grunt.registerTask('build', [
 		'clean',
 		'validate',
-		'webpack',
+		'esbuild',
 		'configure',
 		'babel',
 		'concat:engine',

build/tasks/esbuild.js

@@ -0,0 +1,34 @@
+const { build } = require('esbuild');
+const path = require('path');
+
+module.exports = function(grunt) {
+	grunt.registerMultiTask(
+		'esbuild',
+		'Task to run the esbuild javascript bundler',
+		function() {
+			const done = this.async();
+			const files = grunt.task.current.data.files;
+
+			files.forEach(file => {
+				const src = Array.isArray(file.src) ? file.src : [file.src];
+				const dest = file.dest;
+
+				src.forEach(entry => {
+					const name = path.basename(entry);
+					if (file.cwd) {
+						entry = path.join(file.cwd, entry);
+					}
+
+					build({
+						entryPoints: [entry],
+						outfile: path.join(dest, name),
+						minify: false,
+						bundle: true
+					})
+						.then(done)
+						.catch(done);
+				});
+			});
+		}
+	);
+};