checkin toy sample closure app

Author: samthor

.npmignore

@@ -3,3 +3,4 @@ node_modules
 .DS_Store
 externs/pom.xml
 test
+samples

samples/.gitignore

@@ -0,0 +1 @@
+dist/

samples/README.md

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+This folder contains a toy project that compiles with the Closure Compiler in JS.
+
+You'll need `gulp`.
+If you don't have it, run `npm install -g gulp`.
+Then, check out this repo, install the dependencies, and run the Gulp tool-
+
+```bash
+$ git clone https://github.com/google/closure-compiler-js.git
+$ cd closure-compiler-js/samples
+$ npm install
+$ gulp
+```
+
+This will generate an output file and source map inside `dist`.
+You can run the `output.min.js` file with Node, or inside a browser.

samples/gulpfile.js

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+/*
+ * Copyright 2016 The Closure Compiler Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Gulpfile to compile with Closure Compiler in JS.
+ */
+
+const compiler = require('google-closure-compiler-js').gulp();
+const gulp = require('gulp');
+const sourcemaps = require('gulp-sourcemaps');
+
+gulp.task('default', function() {
+  return gulp.src(['helper.js', 'index.js'])
+    .pipe(sourcemaps.init())
+    .pipe(compiler({
+      jsOutputFile: 'output.min.js',  // filename returned to gulp
+      compilationLevel: 'ADVANCED',   // as opposed to 'SIMPLE', the default
+      warningLevel: 'VERBOSE',        // complain loudly on errors
+      createSourceMap: true,          // create output source map
+      processCommonJsModules: true,   // needed to support require()
+    }))
+    .pipe(sourcemaps.write('/'))
+    .pipe(gulp.dest('./dist'));
+});

samples/helper.js

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+/*
+ * Copyright 2016 The Closure Compiler Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Demo library for an application compiled with Closure.
+ */
+
+let value = 0;
+
+module.exports = function() {
+  return `I've been called ${++value} times`;
+};

samples/index.js

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+/*
+ * Copyright 2016 The Closure Compiler Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @fileoverview Demo entry point for an application compiled with Closure.
+ */
+
+'use strict';
+
+const helperModule = require('./helper');
+
+let authors = 'The Closure Compiler Authors';
+console.info(`I'm a test module by ${authors}.`);
+
+if (typeof document !== 'undefined') {
+  const h1 = document.createElement('h1');
+  h1.textContent = 'Loud heading is loud';
+  document.body.appendChild(h1);
+}
+
+console.warn('Output from helperModule: ' + helperModule());
+console.warn('Some more output from helperModule: ' + helperModule());

samples/package.json

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+{
+  "name": "google-closure-compiler-js_samples",
+  "version": "1.0.0",
+  "main": "index.js",
+  "author": "The Closure Compiler Authors",
+  "private": true,
+  "license": "Apache-2.0",
+  "dependencies": {
+    "google-closure-compiler-js": "latest"
+  }
+}