address #68

.babelrc

@@ -0,0 +1,7 @@
+{
+  "presets": ["@babel/env"],
+  "plugins": [
+     "@babel/proposal-export-namespace-from",
+     ["@babel/plugin-transform-runtime", {"regenerator":true}]
+  ]
+}

.travis.yml

@@ -1,3 +1,5 @@
 language: node_js
 node_js:
   - "node"
+  - "12"
+  - "10"

Makefile

@@ -1,15 +1,16 @@
+PJ=package.json
 TS=combinatorics.ts
 JS=combinatorics.js
 MJS=combinatorics.mjs
 DTS=combinatorics.d.ts
 
-all: $(JS)
+all: $(PJ) $(JS)
 
-$(JS): $(TS)
+$(JS): $(PJ) $(TS)
 	tsc -d --target es6 $(TS)
 
-test: $(JS)
-	mocha --require esm
+test: $(PJ) $(JS)
+	mocha --require @babel/register
 
 clean:
 	-rm $(DTS) $(MJS) $(JS)

package.json

@@ -1,6 +1,7 @@
 {
   "name": "js-combinatorics",
   "version": "1.2.1",
+  "type" : "module",
   "description": "Simple combinatorics like power set, combination, and permutation in JavaScript",
   "main": "combinatorics.js",
   "module": "combinatorics.js",
@@ -13,6 +14,10 @@
   "devDependencies": {
     "typescript": "^3.9.7",
     "@types/node": "^14.0.26",
+    "@babel/plugin-proposal-export-namespace-from": "^7.10.4",
+    "@babel/plugin-transform-runtime": "^7.10.4",
+    "@babel/preset-env": "^7.10.4",
+    "@babel/register": "^7.10.4",
     "mocha": "^8.0.0",
     "chai": "^4.2.0"
   },

test/00-node.js

@@ -1,2 +1,4 @@
-global.chai = require('chai');
+// global.chai = require('chai');
+import chai from 'chai';
+global.chai = chai;
 global.isLegacySafari = false;