Refactor code to use ES module syntax

Author: albertosantini

eslint.config.js

@@ -1,17 +1,15 @@
-"use strict";
+import globals from "globals";
+import js from "@eslint/js";
 
-const globals = require("globals");
-const js = require("@eslint/js");
-
-module.exports = [
+export default [
     js.configs.recommended,
     {
         languageOptions: {
             globals: {
                 ...globals.builtin,
                 ...globals.node
             },
-            sourceType: "commonjs"
+            sourceType: "module"
         },
         rules: {
             "array-bracket-spacing": "error",

index.js

@@ -1,3 +1 @@
-"use strict";
-
-module.exports = require("./lib/quadprog");
+export * from "./lib/quadprog.js";

lib/dpofa.js

@@ -1,5 +1,3 @@
-"use strict";
-
 function dpofa(a, lda, n) {
     let info, jm1, t, s;
 
@@ -35,4 +33,4 @@ function dpofa(a, lda, n) {
     return info;
 }
 
-module.exports = dpofa;
+export default dpofa;

lib/dpori.js

@@ -1,5 +1,3 @@
-"use strict";
-
 function dpori(a, lda, n) {
     let kp1, t;
 
@@ -28,4 +26,4 @@ function dpori(a, lda, n) {
     }
 }
 
-module.exports = dpori;
+export default dpori;

lib/dposl.js

@@ -1,5 +1,3 @@
-"use strict";
-
 function dposl(a, lda, n, b) {
     let k, t;
 
@@ -26,4 +24,4 @@ function dposl(a, lda, n, b) {
     }
 }
 
-module.exports = dposl;
+export default dposl;

lib/qpgen2.js

@@ -1,9 +1,7 @@
-"use strict";
-
-const vsmall = require("./vsmall");
-const dpori = require("./dpori");
-const dposl = require("./dposl");
-const dpofa = require("./dpofa");
+import vsmall from "./vsmall.js";
+import dpori from "./dpori.js";
+import dposl from "./dposl.js";
+import dpofa from "./dpofa.js";
 
 function qpgen2(dmat, dvec, fddmat, n, sol, lagr, crval, amat, bvec, fdamat, q, meq, iact, nnact, iter, work, ierr) {
     let l1, it1, nvl, nact, temp, sum, t1, tt, gc, gs, nu, t1inf, t2min, go;
@@ -413,4 +411,4 @@ function qpgen2(dmat, dvec, fddmat, n, sol, lagr, crval, amat, bvec, fdamat, q,
 
 }
 
-module.exports = qpgen2;
+export default qpgen2;

lib/quadprog.js

@@ -1,6 +1,4 @@
-"use strict";
-
-const qpgen2 = require("./qpgen2");
+import qpgen2 from "./qpgen2.js";
 
 function solveQP(Dmat, dvec, Amat, bvec = [], meq = 0, factorized = [0, 0]) {
     const crval = [];
@@ -83,4 +81,4 @@ function solveQP(Dmat, dvec, Amat, bvec = [], meq = 0, factorized = [0, 0]) {
     };
 }
 
-exports.solveQP = solveQP;
+export { solveQP };

lib/vsmall.js

@@ -1,5 +1,3 @@
-"use strict";
-
 let epsilon = 1.0e-60;
 let tmpa;
 let tmpb;
@@ -10,4 +8,4 @@ do {
     tmpb = 1 + 0.2 * epsilon;
 } while (tmpa <= 1 || tmpb <= 1);
 
-module.exports = epsilon;
+export default epsilon;

package.json

@@ -3,6 +3,7 @@
     "description": "Module for solving quadratic programming problems",
     "version": "1.6.1",
     "main": "index",
+    "type": "module",
     "repository": "http://github.com/albertosantini/quadprog",
     "keywords": [
         "quadprog",
@@ -15,7 +16,7 @@
         "node": ">=18.x"
     },
     "scripts": {
-        "test": "npm run lint && node --test test/solution-test.js && npm run benchmark",
+        "test": "npm run lint && node --test --test-reporter=spec test/solution-test.js && npm run benchmark",
         "lint": "eslint .",
         "benchmark": "node test/bench.js"
     },

test/bench.js

@@ -1,10 +1,6 @@
-"use strict";
-
-const fs = require("node:fs");
-
-const { performance } = require("node:perf_hooks");
-
-const solve = require("../lib/quadprog").solveQP;
+import { readFileSync, readdirSync } from "node:fs";
+import { performance } from "node:perf_hooks";
+import { solveQP } from "../lib/quadprog.js";
 
 function wsolve(file) {
     const {
@@ -14,13 +10,13 @@ function wsolve(file) {
         bvec,
         meq,
         factorized
-    } = JSON.parse(fs.readFileSync(file).toString());
+    } = JSON.parse(readFileSync(file).toString());
 
     [Dmat, Amat].forEach(m => m.forEach(r => r.unshift(0)));
     [Dmat, dvec, Amat, bvec].forEach(v => v.unshift([]));
 
     function wrapped() {
-        solve(
+        solveQP(
             Dmat.map(r => r.slice()),
             dvec.slice(),
             Amat.map(r => r.slice()),
@@ -32,7 +28,7 @@ function wsolve(file) {
     return wrapped;
 }
 
-fs.readdirSync("test")
+readdirSync("test")
     .filter(f => f.endsWith("-data.json"))
     .forEach(f => {
         const testName = f.slice(0, -10);