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alexeaglealexeagle
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feat(examples): replace examples/webapp with new rollup_bundle
This demonstrates how to stitch together a complete app. Note that injecting script tags no longer works because rollup_bundle produces only a directory output. We'll try to figure out how to restore that feature. In the meantime we just hard-code script tag paths
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Lines changed: 2330 additions & 61 deletions

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‎examples/BUILD.bazel‎

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@@ -88,6 +88,8 @@ example_integration_test(
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name = "examples_webapp",
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npm_packages = {
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"//packages/protractor:npm_package": "@bazel/protractor",
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"//packages/rollup:npm_package": "@bazel/rollup",
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"//packages/terser:npm_package": "@bazel/terser",
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},
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)
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‎examples/webapp/BUILD.bazel‎

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load("@build_bazel_rules_nodejs//:defs.bzl", "rollup_bundle")
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# TODO(alexeagle): promote web_package rule to the public API
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load("@build_bazel_rules_nodejs//internal/web_package:web_package.bzl", "web_package")
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load("@npm//@babel/cli:index.bzl", "babel")
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load("@npm//http-server:index.bzl", "http_server")
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load("@npm_bazel_protractor//:index.bzl", "protractor_web_test_suite")
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load("@npm_bazel_rollup//:index.bzl", "rollup_bundle")
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load("@npm_bazel_terser//:index.bzl", "terser_minified")
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rollup_bundle(
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name = "bundle",
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name = "chunks",
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srcs = glob(["*.js"]),
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entry_point = ":index.js",
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entry_point = "index.js",
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output_dir = True,
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)
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# For older browsers, we'll transform the output chunks to es5 + systemjs loader
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babel(
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name = "chunks_es5",
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args = [
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"$(location chunks)",
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"--config-file",
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"$(location es5.babelrc)",
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"--out-dir",
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"$@",
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],
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data = [
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"chunks",
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"es5.babelrc",
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"@npm//@babel/preset-env",
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],
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output_dir = True,
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)
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# Run terser against both modern and legacy browser chunks
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terser_minified(
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name = "chunks_es5.min",
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src = "chunks_es5",
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)
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terser_minified(
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name = "chunks.min",
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src = "chunks",
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)
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web_package(
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name = "package",
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# FIXME: need something like:
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# entry_point = "index.js",
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assets = [
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# For differential loading, we supply both an ESModule entry point and an es5 entry point
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# The injector will put two complimentary script tags in the index.html
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":bundle.min.js",
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":bundle.min.es2015.js",
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"styles.css",
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],
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data = [
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"favicon.png",
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":bundle",
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# For differential loading, we supply both ESModule chunks and es5 chunks.
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# The injector will put two complimentary script tags in the index.html
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":chunks.min",
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":chunks_es5.min",
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],
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index_html = "index.html",
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)

‎examples/webapp/es5.babelrc‎

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{
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"presets": [
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[
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"@babel/preset-env",
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{
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"modules": "systemjs"
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}
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]
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]
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}

‎examples/webapp/index.html‎

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<head>
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<title>rules_nodejs webapp example</title>
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<link rel="icon" href="/favicon.png">
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<!-- CSS will be linked here -->
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<!-- CSS will be linked here from web_package#assets -->
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</head>
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<!-- JS scripts will be included here -->
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<!-- TODO: figure out how diff. loading interacts with
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https://www.npmjs.com/package/rollup-plugin-bundle-html -->
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<script type="module" src="/chunks.min/chunks.js"></script>
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<script nomodule="" src="/chunks_es5.min/chunks.js"></script>
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</html>

‎examples/webapp/index.js‎

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import {hello} from './strings.en';
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const el = document.createElement('div');
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el.innerText = hello;
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el.className = 'ts1';
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document.body.appendChild(el);
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// clang-format off
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import('./strings.en').then(m => {
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const msg = document.createElement('div');
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msg.innerText = m.hello();
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msg.className = 'ts1';
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document.body.appendChild(msg);
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});

‎examples/webapp/package.json‎

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{
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"private": true,
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"devDependencies": {
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"@babel/cli": "^7.6.0",
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"@babel/core": "^7.6.0",
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"@babel/preset-env": "^7.6.0",
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"@bazel/rollup": "latest",
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"@bazel/terser": "latest",
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"@bazel/protractor": "latest",
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"http-server": "^0.11.1"
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"http-server": "^0.11.1",
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"terser": "^4.3.1",
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"rollup": "1.21.4"
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},
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"scripts": {
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"test": "bazel test ..."

‎examples/webapp/strings.en.js‎

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export const hello = 'Hello Webapp';
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export function hello() {
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return 'Hello Webapp';
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}

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