added ESM support

package.json

@@ -51,7 +51,9 @@
     "format": "npx prettier --arrow-parens=avoid --print-width=160 --trailing-comma=none --write *.js *.ts",
     "perf": "node perf.js",
     "prepublishOnly": "npx pkg-ok",
-    "test": "node test.js"
+    "test": "npm run test:js && npm run test:ts",
+    "test:js": "node test.js",
+    "test:ts": "npx ts-node ./test.ts"
   },
   "repository": {
     "type": "git",

preciso.d.ts

@@ -2,7 +2,6 @@ export function absolute(n: string): string;
 export function add(a: string, b: string): string;
 export function ceil(n: string): string;
 export function compare(a: string, b: string): "<" | ">" | "=";
-export function ceil(n: string): string;
 export function divide(dividend: string, divisor: string, options?: { max_decimal_digits: number; ellipsis: boolean }): string;
 export function floor(n: string): string;
 
@@ -18,3 +17,21 @@ export function remainder(dividend: string, divisor: string): string;
 export function sign(n: string): string;
 export function subtract(a: string, b: string): string;
 export function truncate(n: string);
+
+declare const preciso: {
+  absolute: typeof absolute;
+  add: typeof add;
+  ceil: typeof ceil;
+  compare: typeof compare;
+  divide: typeof divide;
+  floor: typeof floor;
+  max: typeof max;
+  min: typeof min;
+  multiply: typeof multiply;
+  pow: typeof pow;
+  remainder: typeof remainder;
+  sign: typeof sign;
+  subtract: typeof subtract;
+  truncate: typeof truncate;
+};
+export default preciso;

preciso.js

@@ -102,6 +102,9 @@ if (typeof define === "function" && define.amd)
   define(function () {
     return module_exports;
   });
-if (typeof module === "object") module.exports = module_exports;
+if (typeof module === "object") {
+  module.exports = module_exports;
+  module.exports.default = module_exports;
+}
 if (typeof window === "object") window.preciso = module_exports;
 if (typeof self === "object") self.preciso = module_exports;

test.ts

@@ -0,0 +1,12 @@
+import test from "flug";
+
+import preciso from "./preciso";
+import { divide } from "./preciso";
+
+test("import preciso", ({ eq }) => {
+  eq(preciso.add("1", "2"), "3");
+});
+
+test("import { divide } from ", ({ eq }) => {
+  eq(divide("1", "2"), "0.5");
+});