🔧 Add ESM-es5 build

.babelrc

@@ -1,3 +1,13 @@
 {
-  "presets": ["env"]
+  "env": {
+    "development": {
+      "presets": ["env"]
+    },
+    "production": {
+      "presets": ["env"]
+    },
+    "esm": {
+      "presets": [["env", { "modules": false }]]
+    }
+  }
 }

.travis.yml

@@ -3,6 +3,7 @@ sudo: false
 node_js:
   - "7.0.0"
 script:
-  - webpack --config utils/webpack.config.js
-  - webpack --config utils/webpack.config.min.js
+  - npm run build
+  - npm run build-min
+  - npm run build-esm
   - mocha --compilers js:babel-register --recursive spec

package.json

@@ -3,7 +3,7 @@
   "description": "Javascript Matrix and Vector library for High Performance WebGL apps",
   "version": "2.7.1",
   "main": "dist/gl-matrix.js",
-  "module": "src/gl-matrix.js",
+  "module": "lib/gl-matrix.js",
   "homepage": "http://glmatrix.net",
   "license": "MIT",
   "bugs": {
@@ -30,9 +30,11 @@
     "update-license-version": "node utils/update-license-version.js",
     "build": "webpack --config utils/webpack.config.js",
     "build-min": "webpack --config utils/webpack.config.min.js",
-    "build-all": "npm run update-license-version&&npm run build&&npm run build-min"
+    "build-esm": "BABEL_ENV=esm babel src -d lib",
+    "build-all": "npm run update-license-version&&npm run build&&npm run build-min&&npm run build-esm"
   },
   "devDependencies": {
+    "babel-cli": "^6.26.0",
     "babel-core": "^6.26.3",
     "babel-loader": "^7.1.4",
     "babel-preset-env": "^1.7.0",
@@ -41,8 +43,8 @@
     "mocha": "^5.1.1",
     "node-libs-browser": "^2.1.0",
     "uglifyjs-webpack-plugin": "^1.2.5",
-    "webpack-cli": "^2.1.3",
-    "webpack": "^4.8.3"
+    "webpack": "^4.8.3",
+    "webpack-cli": "^2.1.3"
   },
   "dependencies": {},
   "sideEffects": false