replace uglify-es with dart terser

Author: mymth

.eslintrc.js

@@ -1,7 +1,7 @@
 module.exports = {
   env: {
     browser: true,
-    es6: true,
+    es2017: true,
   },
   extends: 'eslint:recommended',
   parserOptions: {

dist/js/datepicker-full.js

@@ -2831,4 +2831,4 @@
   window.Datepicker = Datepicker;
   window.DateRangePicker = DateRangePicker;
 
-}());
+})();

dist/js/datepicker-full.min.js

@@ -2623,4 +2623,4 @@ var Datepicker = (function () {
 
   return Datepicker;
 
-}());
+})();

dist/js/datepicker.js

@@ -46,9 +46,9 @@
   "homepage": "https://github.com/mymth/vanillajs-datepicker#readme",
   "devDependencies": {
     "@rollup/plugin-node-resolve": "^11.0.1",
+    "autoprefixer": "^10.3.7",
     "bootstrap4": "npm:bootstrap@^4.5.3",
     "bootstrap5": "npm:bootstrap@^5.0.1",
-    "autoprefixer": "^10.3.7",
     "bulma": "^0.9.1",
     "bulma-tooltip": "^3.0.2",
     "cssnano": "^4.1.10",
@@ -63,7 +63,7 @@
     "sass": "^1.43.4",
     "simulant": "^0.2.2",
     "sinon": "^9.2.2",
-    "uglify-es": "^3.3.9",
+    "terser": "^5.9.0",
     "unexpected": "^12.0.0"
   }
 }

dist/js/datepicker.min.js

@@ -1,17 +1,23 @@
 const fs = require('fs');
 const path = require('path');
-const {minify} = require('uglify-es');
+const {minify} = require('terser');
 
 const distDir = `${path.dirname(__dirname)}/dist/js`;
 const files = ['datepicker', 'datepicker-full'];
 
-files.forEach((basename) => {
-  const fileNameBase = `${distDir}/${basename}`;
-  const file = fs.readFileSync(`${fileNameBase}.js`, 'utf8');
-  const {code, error} = minify(file);
+Promise.all(files.map((basename) => {
+  return new Promise((resolve) => {
+    const fileNameBase = `${distDir}/${basename}`;
+    const file = fs.readFileSync(`${fileNameBase}.js`, 'utf8');
 
-  if (error) {
-    throw error;
-  }
-  fs.writeFileSync(`${fileNameBase}.min.js`, code);
-});
+    minify(file)
+      .then((result) => {
+        fs.writeFileSync(`${fileNameBase}.min.js`, result.code);
+        resolve();
+      });
+  })
+  .catch((err) => {
+    console.error(err);
+    return err;
+  });
+}));

package-lock.json

@@ -118,4 +118,4 @@ var dateUtils = (function (exports) {
 
   return exports;
 
-}({}));
+})({});

package.json

@@ -67,4 +67,4 @@ var domUtils = (function (exports) {
 
   return exports;
 
-}({}));
+})({});