common.js in bootstrap plugin throws in IE

@dojo/webpack-contrib

This repository contains all of the custom Webpack plugins and loaders used by @dojo/cli-build-app and @dojo/cli-build-widget to facilitate building Dojo 2 applications and widgets, respectively.

Usage
Loaders
Plugins
Transformers
- registry-transformer
- element-transformer
How do I contribute?
- Code Style
- Testing
Licensing information

Usage

To use @dojo/webpack-contrib in a single project, install the package:

npm install @dojo/webpack-contrib

Loaders

css-module-decorator-loader

A webpack loader that injects CSS module path information into the generated modules, making it easier for @dojo/widget-core to resolve theme styles. This loader takes no options.

css-module-dts-loader

A webpack loader that generates .d.ts files for CSS modules. This is used by both @dojo/cli-build-app and @dojo/cli-build-widget to provide in-widget type checks for CSS classes.

The loader expects the following options:

Property	Type	Optional	Description
type	`'ts'` or `'css'`	No	The type of file being processed. If `ts`, the loader assumes the resource is a TypeScript file and will parse it for CSS module imports. If any CSS modules are found, then the loader generates a `d.ts` file for each. If `css` is specified, then the loader assumes the resource is a CSS module and generates the `.d.ts` file for it.
instanceName	`string`	Yes	An optional instance name for the TypeScript compiler created by the `ts-loader`. This option is valid only when the `type` is `ts`, and ensures the same compiler instance is used across all files.

Example:

const webpackConfig = {
	loaders: [
		// Generate `.d.ts` files for all CSS modules imported in TypeScript files beneath
		// the `src/` directory
		{
			include: './src/',
			test: /\.ts$/,
			enforce: 'pre',
			loader: '@dojo/webpack-contrib/css-module-dts-loader?type=ts&instanceName=APP_NAME'
		},
		// Generate `.d.ts` files for all CSS modules beneath the `src/` directory
		{
			include: './src/',
			test: /\.m\.css$/,
			enforce: 'pre',
			loader: '@dojo/webpack-contrib/css-module-dts-loader?type=css'
		}
	]
};

promise-loader

A webpack loader that returns a promise from require() calls that resolves to the requested resource. It also removes absolute paths from source maps, ensuring consistent builds across environments. It is used by @dojo/cli-build-app for lazily loading bundles.

This loader expects two parameters, one required and one optional:

The required promise implementation (e.g., bluebird). If there already exists a global Promise constructor, then global should be specified.
An optional chunk name.

Example:

const resourcePromise = require('@dojo/webpack-contrib/promise-loader?global,resource-chunk-name!./path/to/resource');
resourcePromise.then((resource) => {
	// resource is available
})

static-build-loader

A webpack loader which allows code to be statically optimized for a particular context at bundling time. This loader acts on JavaScript. Some examples show the TypeScript source, but the loader will only work if acting on the compiled output.

Features

The loader examines code, looking for usages of @dojo/has, @dojo/has.exists, @dojo/has.add, or has pragmas to optimize. It does this by parsing the AST structure of the code, and modifying it when appropriate.

The loader takes three options:

features: A map of static features or a feature or list of features that resolve to a similar static map based on the functionality provided by the specified targets. Each key in the map is the name of the feature and the value is true if the feature is present in that context, otherwise false.
isRunningInNode: An optional boolean parameter. If set to false this indicates that the loader will not be running in an environment with a Node-like require.
staticOnly: A list of feature keys that should not have has.add calls modified. In most cases, this option will not be needed. It is provided for cases where a module will sometimes be parsed and have its flags resolved statically if so, but may also not be parsed and may require a different runtime value for the flag.

For example in a webpack configuration, the map of features would look like this:

{
    use: [
        {
            loader: '@dojo/webpack-contrib/static-build-loader',
            options: {
                features: {
                    'foo': true,
                    'bar': false
                },
                staticOnly: ['bar']
            }
        }
    ]
};

This asserts feature foo is true and feature bar is false. Alternatively a list of features can be provided that will be resolved to the appropriate map

{
	use: [
		{
			loader: '@dojo/webpack-contrib/static-build-loader',
			options: {
				features: [ 'firefox', 'chrome' ]
			}
		}
	]
}

Available features

When specifying a static map, any values can be used. When passing a string or list of strings, the following values are supported. Each value corresponds to the set of known features that the environment supports. If multiple features are specified, the intersection of available features will be returned.

android
chrome
edge
firefox
ie11
ios
node
node8
safari

In either case, the resulting map is then used in the features below.

Dead Code Removal

The loader assumes that the @dojo/has API is being used in modules that are being compiled into a webpack bundle and attempts to rewrite calls to the has() API when it can see it has a statically asserted flag for that feature.

The loader detects structures like the following in transpiled TypeScript modules:

import has from './has';

if (has('foo')) {
    console.log('has foo');
}
else {
    console.log('doesn\'t have foo');
}

const bar = has('bar') ? 'has bar' : 'doesn\'t have bar';

And will rewrite the code (given the static feature set above), like:

import has from './has';

if (true) {
    console.log('has foo');
}
else {
    console.log('doesn\'t have foo');
}

const bar = false ? 'has bar' : 'doesn\'t have bar';

When this is minified via Uglify via webpack, Uglify looks for structures that can be optimised and would re-write it further to something like:

import has from './has';

console.log('has foo');

const bar = 'doesn\'t have bar';

Any features which are not statically asserted, are not re-written. This allows the code to determine at run-time if the feature is present.

Elided Imports

The loader looks for has pragmas, which are strings that contain a call to has for a specific feature, and removes the next import found in the code. For example, given the above feature set, which has foo = true and bar = false, the imports of 'a' and 'b' would be removed but 'c' and 'd' would remain.

"has('foo')";
const statementBeforeImport = 3;
// This is the next import so it will be removed despite
// the conetnet between it and the pragma
import 'a';
// The pragma can be negated to remove the import if the condition
// is known to be false
'!has("bar")';
import 'b';
'!has("foo")';
// This import will not be removed because `foo` is not false
import 'c';

'has("baz")';
// This import will not be removed because the value of `has('baz')`
// is now known statically
import 'd';

Plugins

build-time-render

A webpack plugin that generates a bundle's HTML and inlines critical CSS at build time. This is similar to server-side rendering, but does not require a dedicated server to manage it.

The plugin takes an options object with the following properties:

Property	Type	Optional	Description
entries	`string[]`	No	The entry scripts to include in the generated HTML file
paths	`string[]` or `{ path: string; match: string[] }`	Yes	An array of paths that will be matched against the URL hash, rendering the HTML associated with any matched path. If the path is a string, then it will be compared directly to `window.location.hash`. If the path is an object, then it should include a `path` string that will be used to resolve the HTML, and `match` string array that represents multiple paths that should trigger the `path` to be rendered. Defaults to an empty array ('[]').
root	`string`	Yes	The ID for the root HTML element. If falsy, then no HTML will be generated. Defaults to an emtpy string (`''`).
useManifest	`boolean`	Yes	Determines whether a manifest file should be used to resolve the entries. Defaults to `false`.
static	`boolean`	Yes	Removes js and css scripts tags from generated `index.html` files for truly static sites. Not compatible with hash routing. Defaults to `false`.

Usage

Beyond the plugin itself, it is also beneficial to include the @dojo/webpack-contrib/build-time-render/hasBuildTimeRender module in the entry config option. This file adds the has('build-item-render') flag that applications can use to determine whether the app has been pre-rendered.

The following example will generate an HTML file containing <script> tags for the specified entries, along with the critical CSS and HTML for the root, #account, and #help paths. Both the #faq and #contact hashes will display the #help HTML.

import BuildTimeRender from '@dojo/webpack-contrib/build-time-render/BuildTimeRender';

const entry = {
	main: {
		'@dojo/webpack-contrib/build-time-render/hasBuildTimeRender',
		'./src/main.ts',
		'./src/main.css'
	}
};

const webpackConfig = {
	entry,
	plugins: [
		new BuildTimeRender({
			entries: Object.keys(entry),
			paths: [
				'#account',
				{ path: '#help', match: [ 'faq', 'contact' ] }
			],
			root: 'app',
			useManifest: true
		})
	]
};

css-module-plugin

A webpack plugin that converts .m.css import paths to .m.css.js. This is used in conjunction with the css-module-dts-loader loader to ensure that webpack can probably resolve CSS module paths.

If the requested resource uses a relative path, then its path will be resolved relative to the requesting module. Otherwise, the resource will be loaded from ${basePath}node_modules (see below for the definition of basePath):

// Path is relative to the current module
import * as localCss from './path/to/local-styles.m.css';

// Imported from node_modules
import * as externalCss from 'some-mid/styles.m.css';

The plugin constructor accepts a single argument:

Property	Type	Optional	Description
basePath	`string`	No	The root path from which to resolve CSS modules

emit-all-plugin

Webpack is a bundler, which does not work well when build libraries. Rather than create separate toolchains for building libraries and applications/custom elements, the existing build tooling can be used to emit library files by way of the emitAllFactory that produces both a plugin instance and a custom TypeScript transformer. The transformer is needed to ensure that any .d.ts dependencies are correctly emitted, while the plugin ensures assets are emitted as individual files instead of as a generated bundle:

import { emitAllFactory } from '@dojo/webpack-contrib/emit-all-plugin/EmitAllPlugin';

// See list of available options below
const emitAll = emitAllFactory(options);

const config = {
	// ...
	plugins: [
		...,
		emitAll.plugin
	],
	module: {
		rules: [
			// ...
			{
				test: /.*\.ts(x)?$/,
				use: [
					{
						loader: 'ts-loader',
						options: {
							// ...
							getCustomTransformers(program) {
								return {
									before: [
										emitAll.transformer()
									]
								};
							}
						}
					}
				]
			}
		]
	}
}

At the very least CSS and transpiled TS files will be emitted, but additional assets can be included with a filter.

The factory takes an options object with the following properties:

Property	Type	Optional	Description
basePath	`string`	Yes	The base path for the project's source files. Only files within this directory are emitted. Defaults to the project's `src/` directory.
inlineSourceMaps	`boolean`	Yes	Specifies whether sources maps should be inlined with the output source files or emitted separately. Defaults to `false`.
legacy	`boolean`	Yes	Specifies whether TypeScript files should be transpiled to ES modules or to legacy JavaScript. Defaults to `false`.
assetFilter	`Function`	Yes	Used to filter assets to only those that should be included in the output. Accepts the asset file path and the asset object. If the function returns `true`, the asset will be emitted; otherwise it will be excluded.

external-loader-plugin

External libraries that cannot be loaded normally via webpack can be included in a webpack build using this plugin.

The plugin takes an options object with the following properties:

Property	Type	Optional	Description
dependencies	`ExternalDep[]`	No	External dependencies to load. Described in more detail below
hash	`boolean`	Yes	Whether to use the build's hash to cache bust injected dependencies
outputPath	`string`	Yes	Where to copy dependencies to; defaults to "externals"
pathPrefix	`string`	Yes	Used to change the directory where files are placed(e.g. placing files in `_build` for testing)

All external dependencies specified in the dependencies options will be placed in ${pathPrefix}/${outputPath}. Each ExternalDep in the dependencies array specifies one external dependency. Each can be a string, indicating a path that should be delegated to the configured loader, or an object with the following properties:

Property	Type	optional	Description
`from`	`string`	`false`	A path relative to the root of the project specifying the dependency location to copy into the build application.
`to`	`string`	`true`	A path that replaces `from` as the location to copy this dependency to. By default, dependencies will be copied to `${externalsOutputPath}/${to}` or `${externalsOutputPath}/${from}` if `to` is not specified. If the path includes `.` characters, it must end in a forward slash to be treated as a directory
`name`	`string`	`true`	Indicates that this path, and any children of this path, should be loaded via the external loader
`inject`	`string, string[], or boolean`	`true`	This property indicates that this dependency defines, or includes, scripts or stylesheets that should be loaded on the page. If `inject` is set to `true`, then the file at the location specified by `to` or `from` will be loaded on the page. If this dependency is a folder, then `inject` can be set to a string or array of strings to define one or more files to inject. Each path in `inject` should be relative to `${externalsOutputPath}/${to}` or `${externalsOutputPath}/${from}` depending on whether `to` was provided.

i18n-plugin

Rather than manually set locale data within an application's entry point, that data can instead be read from a config and injected in at build time.

The plugin accepts an options object with the following properties:

Property	Type	Optional	Description
cldrPaths	`string[]`	Yes	An array of paths to CLDR JSON modules that should be included in the build and registered with the i18n ecosystem. If a path begins with a ".", then it is treated as relative to the current working directory. Otherwise, it is treated as a valid mid.
defaultLocale	`string`	No	The default locale.
supportedLocales	`string[]`	Yes	An array of supported locales beyond the default.
target	`string`	Yes	The entry point into which the i18n module should be injected. Defaults to `src/main.ts`.

A custom module is generated from the locale data, injected into the bundle, and then imported into the specified entry point. The user's locale is compared against the default locale and supported locales, and if it is supported is set as the root locale for the application. If the user's locale is not supported, then the default locale is used. For example, the user's locale will be used in the following scenarios:

The user's locale can be represented by the default locale:

Default Locale: 'en'
Supported Locales: none
User's locale: 'en-US'

The user's locale can be represented by one of the supported locales:

Default Locale: 'en'
Supported Locales: [ 'fr' ]
User's locale: 'fr-CA'

However, in the following scenario the default locale will be used, although it still will be possible to switch between any of the supported locales at run time, since their required data will also be included in the build:

Default Locale: 'en'
Supported Locales: [ 'de', 'ja', 'ar' ]
User's locale: 'cz'

service-worker-plugin

A custom webpack plugin that generates a service worker from configuration options, or simply ensures a custom service worker is copied to the output directory. Generated service workers support both precaching and runtime caching and allow you specify additional resources that should be loaded by the service worker.

The plugin accepts either a string path for an existing service worker to copy to the output directory, or an options object with the following properties:

Property	Type	Optional	Description
bundles	`string[]`	Yes	An array of bundles to include in the precache. Defaults to all bundles.
cachePrefix	`string`	Yes	The prefix to use for the runtime precache cache.
clientsClaim	`boolean`	Yes	Whether the service worker should start controlling clients on activation. Defaults to `false`.
excludeBundles	`string[]`	Yes	An array of bundles to include in the precache. Defaults to `[]`.
importScripts	`string[]`	Yes	An array of script paths that should be loaded within the service worker
precache	`object`	Yes	An object of precache configuration options (see below)
routes	`object[]`	Yes	An array of runtime caching config objects (see below)
skipWaiting	`boolean`	Yes	Whether the service worker should skip the waiting lifecycle

Precaching

The precache option can take the following options to control precaching behavior:

Property	Type	Optional	Description
baseDir	`string`	Yes	The base directory to match `include` against.
ignore	`string[]`	Yes	An array of glob pattern string matching files that should be ignored when generating the precache. Defaults to `[ 'node_modules/*/' ]`.
include	`string` or `string[]`	Yes	A glob pattern string or an array of glob pattern strings matching files that should be included in the precache. Defaults to all files in the build pipeline.
index	`string`	Yes	The index filename that should be checked if a request fails for a URL ending in `/`. Defaults to `'index.html'`.
maxCacheSize	`number`	Yes	The maximum size in bytes a file must not exceed to be added to the precache. Defaults to `2097152` (2 MB).
strict	`boolean`	Yes	If `true`, then the build will fail if an `include` pattern matches a non-existent directory. Defaults to `true`.
symlinks	`boolean`	Yes	Whether to follow symlinks when generating the precache. Defaults to `true`.

Runtime Caching

In addition to precaching, strategies can be provided for specific routes to determine whether and how they can be cached. This routes option is an array of objects with the following properties:

Property	Type	Optional	Description
urlPattern	`string`	No	A pattern string (which will be converted a regular expression) that matches a specific route.
strategy	`string`	No	The caching strategy (see below).
options	`object`	Yes	An object of additional options, each detailed below.
cacheName	`string`	Yes	The name of the cache to use for the route. Note that the `cachePrefix` is not prepended to the cache name. Defaults to the main runtime cache (`${cachePrefix}-runtime-${domain}`).
cacheableResponse	`object`	Yes	Uses HTTP status codes and or headers to determine whether a response can be cached. This object has two optional properties: `statuses` and `headers`. `statuses` is an array of HTTP status codes that should be considered valid for the cache. `headers` is an object of HTTP header and value pairs; at least one header must match for the response to be considered valid. Defaults to `{ statuses: [ 200 ] }` when the `strategy` is `'cacheFirst'`, and `{ statuses: [0, 200] }` when the `strategy` is either `networkFirst` or `staleWhileRevalidate`.
expiration	`object`	Yes	Controls how the cache is invalidated. This object has two optional properties. `maxEntries` is the number of responses that can be cached at any given time. Once this max is exceeded, the oldest entry is removed. `maxAgeSeconds` is the oldest a cached response can be in seconds before it gets removed.
networkTimeoutSeconds	`number`	Yes	Used with the `networkFirst` strategy to specify how long in seconds to wait for a resource to load before falling back on the cache.

Strategies

Four routing strategies are currently supported:

networkFirst attempts to load a resource over the network, falling back on the cache if the request fails or times out. This is a useful strategy for assets that either change frequently or may change frequently (i.e., are not versioned).
cacheFirst loads a resource from the cache unless it does not exist, in which case it is fetched over the network. This is best for resources that change infrequently or can be cached for a long time (e.g., versioned assets).
networkOnly forces the resource to always be retrieved over the network, and is useful for requests that have no offline equivalent.
staleWhileRevalidate requests resources from both the cache and the network simulaneously. The cache is updated with each successful network response. This strategy is best for resources that do not need to be continuously up-to-date, like user avatars. However, when fetching third-party resources that do not send CORS headers, it is not possible to read the contents of the response or verify the status code. As such, it is possible that a bad response could be cached. In such cases, the networkFirst strategy may be a better fit.

Example

import ServiceWorkerPlugin from '@dojo/webpack-contrib/service-worker-plugin/ServiceWorkerPlugin';

new ServiceWorkerPlugin({
	cachePrefix: 'my-app',

	// exclude the "admin" bundle from caching
	excludeBundles: [ 'admin' ],

	routes: [
		// Use the cache-first strategy for loading images, adding them to the "my-app-images" cache.
		// Only the first ten images should be cached, and for one week.
		{
			urlPattern: '.*\\.(png|jpg|gif|svg)',
			strategy: 'cacheFirst',
			cacheName: 'my-app-images',
			expiration: { maxEntries: 10, maxAgeSeconds: 604800 }
		},

		// Use the cache-first strategy to cache up to 25 articles that expire after one day.
		{
			urlPattern: 'http://my-app-url.com/api/articles',
			strategy: 'cacheFirst',
			expiration: { maxEntries: 25, maxAgeSeconds: 86400 }
		}
	]
});

webpack-bundle-analyzer

A webpack plugin that provides a visualization of the size of webpack output with an interactive sunburst graphic. Functionally this is a copy of webpack-bundle-analyzer with a custom visualization.

The plugin accepts an options object with the following optional properties.

Property	Type	Description	Default
analyzerMode	`'server' or 'static' or 'disabled'`	Whether to serve bundle analysis in a live server, render the report in a static HTML file or files, or to disable visual report generation entirely.	`'server'
analyzerPort	`number`	The port to use in `server` mode	`8888`
reportFilename	`string`	Path to the report bundle file. Multiple report will be created with `-<bundleName>` appended to this value if there is more than one output bundle.	`'report.html'`
openAnalyzer	`boolean`	Whether the report should be opened in a browser automatically	`true`
generateStatsFile	`boolean`	Whether a JSON Webpack Stats file should be generated	`false`
statsFilename	`string`	Name to use for the stats file if one is generated	`'stats.json'`
statsOptons	`any`	Options to pass to `stats.toJson()`. More documentation can be found here	`null`
logLevel	`'info' or 'warn' or 'error' or 'silent'`	The level of logs from this plugin	`'info`'

Example

import BundleAnalyzerPlugin from '@dojo/webpack-contrib/webpack-bundle-analyzer/BundleAnalyzerPlugin';

new BundleAnalyzerPlugin({
	analyzerMode: 'static',
	reportFilename: '../info/report.html',
	openAnalyzer: false
});

bootstrap-plugin

A custom webpack plugin that conditionally loads supported dojo shims based on usage and browser capabilities.

Supported Shims

@dojo/framework/shim/IntersectionObserver
@dojo/framework/shim/ResizeObserver
@dojo/framework/shim/WebAnimations

To use the plugin, use the provided bootstrap.js from @dojo/webpack-contrib/bootstrap-plugin as the application entry and add the plugin to the webpack configuration.

The BootstrapPlugin accepts requires the path to application entry point and an array of shimModules to process.

new BootstrapPlugin({
	entryPath: mainEntryPath,
	shimModules: [
		{
			module: '@dojo/framework/shim/IntersectionObserver',
			has: 'intersection-observer'
		},
		{
			module: '@dojo/framework/shim/ResizeObserver',
			has: 'resize-observer'
		},
		{
			module: '@dojo/framework/shim/WebAnimations',
			has: 'web-animations'
		}
	]
})

Transformers

registry-transformer

A custom TypeScript transformer that generates registry keys for widgets included in lazily-loaded bundles. This allows widget authors to use the same pattern for authoring widgets regardless of whether they are loaded from a registry or imported directly.

For example, if LazyWidget needs to be split into a separate bundle and this transformer is not applied, then LazyWidget would need to be added to the registry (registry.define('lazy-widget', LazyWidget)), and all calls to w(LazyWidget) would need to be updated to reference its registry key (w<LazyWidget>('lazy-widget')). By using this transformer, LazyWidget would instead be added to the registry at build time, allowing existing code to remain unchanged.

element-transformer

A custom TypeScript transformer that generates a custom element definition for specified widgets.

For example given a widget Hello,

import { v } from '@dojo/framework/widget-core/d';
import { WidgetBase } from '@dojo/framework/widget-core/WidgetBase';

interface HelloProperties {
	name: string;
	flag: boolean;
	onClick(): void;
	onChange(value: string): void;
}

export class Hello extends WidgetBase<HelloProperties> {
	protected render() {
		const { name } = this.properties;
		return v('h1', { }, [
			'Hello ${name}!'
		]);
	}
}

export default Hello;

The generated output would be ,

import { v } from '@dojo/framework/widget-core/d';
import { WidgetBase } from '@dojo/framework/widget-core/WidgetBase';

interface HelloProperties {
	name: string;
	flag: boolean;
	onClick(): void;
	onChange(value: string): void;
}

export class Hello extends WidgetBase<HelloProperties> {
	protected render() {
		const { name } = this.properties;
		return v('h1', { }, [
			'Hello ${name}!'
		]);
	}
}
Hello.__customElementDescriptor = { ...{ tagName: 'widget-hello', attributes: ['name'], properties: ['flag'], events: ['onClick', onChange'] }, ...Hello.prototype.__customElementDescriptor || {} };

export default Hello;

How do I contribute?

We appreciate your interest! Please see the Dojo 2 Meta Repository for the Contributing Guidelines.

Code Style

This repository uses prettier for code styling rules and formatting. A pre-commit hook is installed automatically and configured to run prettier against all staged files as per the configuration in the projects package.json.

An additional npm script to run prettier (with write set to true) against all src and test project files is available by running:

npm run prettier

Testing

To test this package, after ensuring all dependencies are installed (npm install), run the following command:

npm run test

dojo / webpack-contrib Goto Github PK

webpack-contrib's Introduction

@dojo/webpack-contrib

Usage

Loaders

css-module-decorator-loader

css-module-dts-loader

promise-loader

static-build-loader

Features

Available features

Dead Code Removal

Elided Imports

Plugins

build-time-render

Usage

css-module-plugin

emit-all-plugin

external-loader-plugin

i18n-plugin

service-worker-plugin

Precaching

Runtime Caching

Strategies

Example

webpack-bundle-analyzer

Example

bootstrap-plugin

Supported Shims

Transformers

registry-transformer

element-transformer

How do I contribute?

Code Style

Testing

Licensing information

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