add deferred template parsing

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@elvoline/twig",
-  "version": "1.1.0",
+  "version": "2.0.0",
   "description": "twig.js renderer for elvoline",
   "module": "dist/es.js",
   "main": "dist/index.js",

readme.md

@@ -6,7 +6,8 @@
 # About
 
 This is a Twig.js renderer customized for use on Elvoline.
-Added features include an always-on promise support, global variables, automatic DOM creation and i18n.
+
+Added features include an always-on promise support, deferred template parsing, global variables, automatic DOM creation and i18n.
 
 # Docs
 

src/renderer.js

@@ -17,19 +17,23 @@ export function addHook (hook) {
 }
 
 export default function (options) {
-	var promise = new Promise((resolve) => {
+	var promise;
+	function deferParse (resolve) {
 		var template = Twig.twig(assign({}, options, {
 			'load': resolve,
 		}));
 
 		if (template.render) {
 			resolve(template);
 		}
-	});
+	}
 
 	return {
-		'promise': promise,
 		'render': (data) => {
+			if (!promise) {
+				promise = new Promise(deferParse);
+			}
+
 			return Promise
 				.all([
 					promise,

test/basic.js

@@ -64,6 +64,22 @@ describe('basic functionality', () => {
 		return expect(promise).to.eventually.equal('it renders bar');
 	});
 
+	it('should not remember variables from previous renders', () => {
+		var template = twig({
+			'data': `it renders {{ foo }}properly`,
+		});
+
+		var promise = Promise
+			.resolve()
+			.then(() => template.render({
+				'foo': 'bar',
+			}))
+			.then(() => template.render())
+			.then((dom) => dom.text());
+
+		return expect(promise).to.eventually.equal('it renders properly');
+	});
+
 	it('should run added hooks with the generated DOM', () => {
 		var template = twig({
 			'data': `it renders`,