esmify the package

bin/lts.js

@@ -1,8 +1,9 @@
 #!/usr/bin/env node
 'use strict';
-const Path = require('path');
-const Bossy = require('bossy');
-const Lib = require('../lib');
+import { resolve } from 'node:path';
+import Bossy from 'bossy';
+import { create } from '../lib/index.js';
+
 const now = new Date();
 const oneYearFromNow = new Date();
 
@@ -15,7 +16,7 @@ const cliArgs = {
     type: 'string',
     require: false,
     multiple: false,
-    default: Path.resolve(__dirname, '..', 'lts.json')
+    default: resolve(__dirname, '..', 'lts.json')
   },
   's': {
     description: 'Query start date',
@@ -91,15 +92,15 @@ if (args instanceof Error) {
 }
 
 const options = {
-  data: require(args.data),
+  data: await import(args.data),
   queryStart: new Date(args.start),
   queryEnd: new Date(args.end),
-  html: args.html ? Path.resolve(args.html) : null,
-  svg: args.svg ? Path.resolve(args.svg) : null,
-  png: args.png ? Path.resolve(args.png) : null,
+  html: args.html ? resolve(args.html) : null,
+  svg: args.svg ? resolve(args.svg) : null,
+  png: args.png ? resolve(args.png) : null,
   animate: args.animate,
   excludeMain: args.excludeMain,
   projectName: args.projectName
 };
 
-Lib.create(options);
+create(options);

lib/index.js

@@ -1,7 +1,7 @@
 'use strict';
-const Fs = require('fs');
-const D3 = require('d3');
-const D3Node = require('d3-node');
+import { writeFileSync } from 'node:fs';
+import D3 from 'd3';  
+import D3Node from 'd3-node';
 
 const styles = `
 .current {
@@ -91,8 +91,7 @@ function parseInput (data, queryStart, queryEnd, excludeMain, projectName) {
   return output;
 }
 
-
-function create (options) {
+export function create (options) {
   const { queryStart, queryEnd, html, svg: svgFile, png, animate, excludeMain, projectName, margin: marginInput } = options;
   const data = parseInput(options.data, queryStart, queryEnd, excludeMain, projectName);
   const d3n = new D3Node({ svgStyles: styles, d3Module: D3 });
@@ -207,18 +206,16 @@ function create (options) {
      });
 
   if (typeof html === 'string') {
-    Fs.writeFileSync(html, d3n.html());
+    writeFileSync(html, d3n.html());
   }
 
   if (typeof svgFile === 'string') {
-    Fs.writeFileSync(svgFile, d3n.svgString());
+    writeFileSync(svgFile, d3n.svgString());
   }
 
   if (typeof png === 'string') {
     const Svg2png = require('svg2png'); // Load this lazily.
 
-    Fs.writeFileSync(png, Svg2png.sync(Buffer.from(d3n.svgString())));
+    writeFileSync(png, Svg2png.sync(Buffer.from(d3n.svgString())));
   }
 }
-
-module.exports.create = create;

package.json

@@ -3,6 +3,7 @@
   "version": "2.0.0",
   "description": "Generate the Node.js LTS schedule",
   "main": "lib/index.js",
+  "type": "module",
   "homepage": "https://github.com/nodejs/lts-schedule",
   "repository": {
     "type": "git",
@@ -19,7 +20,7 @@
     "lts": "bin/lts.js"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=20"
   },
   "dependencies": {
     "bossy": "3.0.4",