feat: switch to ESM source and distributions

BREAKING CHANGE:

Adds `exports`

Also:
1. updates benchmark
2. fixes escodegen with missing options
3. Bumps travis versions
4. bumps devDep.

Author: brettz9

.editorconfig

@@ -12,7 +12,7 @@ indent_style = space
 indent_size = 4
 
 [*.json]
-indent_size = 2
+indent_size = 4
 
 [*.yml]
 indent_size = 2

.eslintignore

@@ -6,5 +6,4 @@ coverage
 
 test/*/*.js
 
-escodegen.browser.min.js
-escodegen.browser.js
+dist

.eslintrc.js renamed to .eslintrc.cjs

@@ -7,14 +7,18 @@ module.exports = {
         SharedArrayBuffer: 'readonly'
     },
     env: {
-        node: true,
         es6: true
     },
     parserOptions: {
         sourceType: 'module',
-        ecmaVersion: 2018
+        ecmaVersion: 2020
     },
     overrides: [{
+        files: ['*-node.js', '.eslintrc.cjs', 'benchmark/**', 'bin/**', 'tools/**'],
+        env: {
+            node: true
+        }
+    }, {
         files: '.eslintrc.js',
         parserOptions: {
             sourceType: 'script'

.gitignore

@@ -8,8 +8,10 @@ node_modules/
 # Cover
 .coverage_data/
 cover_html/
+coverage
+
+.idea
 
 npm-debug.log
 
-escodegen.browser.min.js
-escodegen.browser.js
+dist

.travis.yml

@@ -4,6 +4,7 @@ script:
   - npm run build
   - npm test
 node_js:
-  - 10
   - 12
   - 14
+  - 16
+  - 17

README.md

@@ -16,10 +16,10 @@ for a demo.
 Escodegen can be used in a web browser:
 
 ```html
-<script src="escodegen.browser.js"></script>
+<script src="dist/escodegen.umd.js"></script>
 ```
 
-escodegen.browser.js can be found in tagged revisions on GitHub.
+`dist/escodegen.umd.js` can be found in tagged revisions on GitHub.
 
 Or in a Node.js application via npm:
 
@@ -54,7 +54,7 @@ After that,
 npm run-script build
 ```
 
-will generate `escodegen.browser.js`, which can be used in browser environments.
+will generate `dist/escodegen.umd.js`, which can be used in browser environments.
 
 And,
 

benchmark/asts.js

@@ -1,8 +1,12 @@
-var fs = require('fs'),
-    path = require('path'),
-    esprima = require('esprima');
+import fs from 'fs';
+import path from 'path';
+import { dirname } from 'path';
+import { fileURLToPath } from 'url';
 
-var FILES_PATH = path.join(__dirname, './asts');
+// import esprima from 'esprima';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const FILES_PATH = path.join(__dirname, './asts');
 
 var FILES = [
     'jQuery 1.7.1',
@@ -22,8 +26,8 @@ function slug(name) {
     return name.toLowerCase().replace(/\s/g, '-');
 }
 
-module.exports = FILES.map(function (file) {
-    var astJson = fs.readFileSync(FILES_PATH + '/' + slug(file) + '-ast.json');
+export default FILES.map(function (file) {
+    const astJson = fs.readFileSync(`${FILES_PATH}/${slug(file)}-ast.json`);
 
     return JSON.parse(astJson);
 });

benchmark/index.js

@@ -1,9 +1,8 @@
-var Benchmark = require('benchmark'),
-    escodegen = require('../'),
-    old = require('./old.js'),
-    esotope = require('esotope'),
-    asts = require('./asts');
-
+import Benchmark from 'benchmark';
+import esotope from 'esotope';
+import * as escodegen from '../src/escodegen-node.js';
+import old from './old.cjs';
+import asts from './asts.js';
 
 function cycle(codegen) {
     for (var i = 0; i < asts.length; i++)
@@ -32,7 +31,7 @@ new Benchmark.Suite()
     })
 
     .on('complete', function () {
-        console.log('Fastest is ' + this.filter('fastest').pluck('name'));
+        console.log(`Fastest is ${this.filter('fastest').map('name')}`);
 
         console.log('esotope is x' + (this[0].hz / this[1].hz).toFixed(2) + ' times faster vs escodegen.');
     })