Add bundled esm-build. Add installtion instructions.

README.md

@@ -38,6 +38,31 @@ ASN1.js V2 (ES2015 version) is **incompatible** with ASN1.js V1 code.
 * All types can be initialized in static or dynamic ways.
 * [ASN1js][] fully tested against [ASN.1:2008 TestSuite][].
 
+## Installation
+
+### Node
+
+`npm install --save asn1js`
+
+```javascript
+// ESM
+import { fromBER, /* ... */ } from "asn1js";
+
+// CommonJS
+const asn1js = require("asn1js");
+```
+
+### Browser
+
+Import one of the following files using cdn or manual inclusion
+
+* `src/asn1.js`: ESM with remote dependency of pvutils
+* `build/asn1.bundle.mjs`: ESM with bundled pvutils
+
+### Deno
+
+Import `build/asn1.bundle.mjs` using you favorite method
+
 ## Examples
 
 ```javascript

package.json

@@ -15,15 +15,16 @@
   "devDependencies": {
     "@babel/cli": "^7.0.0",
     "@babel/core": "^7.0.0",
-    "babel-plugin-istanbul": "latest",
     "@babel/preset-env": "^7.0.0",
     "@babel/register": "^7.0.0",
+    "@rollup/plugin-node-resolve": "^13.2.1",
+    "asn1-test-suite": "latest",
+    "babel-plugin-istanbul": "latest",
+    "cross-env": "latest",
     "mocha": "latest",
-    "rollup": "latest",
     "nyc": "latest",
-    "cross-env": "latest",
-    "rollup-plugin-node-resolve": "latest",
-    "asn1-test-suite": "latest"
+    "rollup": "latest",
+    "rollup-plugin-node-resolve": "latest"
   },
   "repository": {
     "type": "git",
@@ -62,7 +63,7 @@
     "index.d.ts"
   ],
   "scripts": {
-    "build": "babel src --compact=false --out-dir build --source-maps",
+    "build": "babel src --compact=false --out-dir build --source-maps && rollup -c ./rollup.config.js",
     "watch": "babel src --compact=false --out-dir build --source-maps --watch",
     "ex1": "cd examples/ASN1Usage && npm run build && cd ../..",
     "build:examples": "npm run ex1",

rollup.config.js

@@ -0,0 +1,12 @@
+import { nodeResolve } from '@rollup/plugin-node-resolve';
+
+export default [
+	{	
+		input: "./src/asn1.js",
+		output: {
+			file: "build/asn1.bundle.mjs",
+			format: "es"
+		},
+		plugins: [nodeResolve()]
+	}
+];