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@@ -155,16 +155,22 @@ Angular 15 is supported by single-spa-angular@8. | |
| Both the [single-spa-angular schematics](#schematics) and the [single-spa helpers](#the-single-spa-helpers) | ||
| work with Angular 15. Follow the [Angular CLI instructions](#angular-cli). | ||
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| ### Angular 16 | ||
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| Angular 16 is supported by single-spa-angular@9. | ||
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| Both the [single-spa-angular schematics](#schematics) and the [single-spa helpers](#the-single-spa-helpers) | ||
| work with Angular 16. Follow the [Angular CLI instructions](#angular-cli). | ||
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| ### Angular 17 | ||
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| Angular 17 is supported by single-spa-angular@9. | ||
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| Both the [single-spa-angular schematics](#schematics) and the [single-spa helpers](#the-single-spa-helpers) | ||
| work with Angular 17. Follow the [Angular CLI instructions](#angular-cli). | ||
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| ### Angular 18 | ||
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| Angular 18 is supported by single-spa-angular@9. | ||
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| Both the [single-spa-angular schematics](#schematics) and the [single-spa helpers](#the-single-spa-helpers) | ||
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@@ -561,16 +567,28 @@ The following options are available: | |
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| ### ZoneJS | ||
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| [ZoneJS](https://github.com/angular/zone.js/) is the library that Angular uses for change detection. You absolutely must have exactly | ||
| one instance of the ZoneJS library on the page. ZoneJS will throw errors if you have more than one instance of ZoneJS on the page. | ||
| [zone.js](https://github.com/angular/zone.js/) is the library that Angular uses for change detection. You absolutely must have exactly | ||
| one instance of the zone.js library on the page. zone.js will throw errors if you have more than one instance of zone.js on the page. | ||
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| The preferred way to ensure only one instance of ZoneJS is loaded on your page is with a script tag in your root-config's HTML file. You should load ZoneJS upfront a single time, before loading SystemJS or any of your microfrontends. | ||
| The preferred way to ensure only one instance of zone.js is loaded on your page is with a script tag in your root-config's HTML file. You should load zone.js upfront a single time, before any of your microfrontends. | ||
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| ```html | ||
| <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/zone.min.js"></script> | ||
| ``` | ||
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| Note that having only one instance of ZoneJS is different than having only one zone within that instance. single-spa-angular | ||
| The latest versions of `zone.js` may not be published to a CDN. As such, you might need to import `zone.js` in your root-config JS file: | ||
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| ```js | ||
| async function start() { | ||
| await import("zone.js"); | ||
| const { registerApplication } = await System.import("single-spa"); | ||
| registerApplication(...); | ||
| } | ||
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| start(); | ||
| ``` | ||
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| Note that having only one instance of zone.js is different than having only one zone within that instance. single-spa-angular | ||
| automatically will ensure that each of your Angular applications has its own isolated, separate zone. | ||
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| ### Multiple applications | ||
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@@ -832,26 +850,15 @@ The below guide uses SystemJS for sharing dependencies. | |
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| > :warning: Angular 13 has few breaking changes. It dropped View Engine support, and this means there's a single template compiler right now (Ivy). They also introduced changes to the Angular Package Format. UMD bundles are no longer generated when building libraries. The `ng-packagr` now emits only ES2015 and ES2020 bundles. See this article for more info: https://blog.angular.io/angular-v13-is-now-available-cce66f7bc296. | ||
| You can use the following esm-bundle packages, which provide Ivy-compatible versions that can be shared via SystemJS: | ||
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| - https://github.com/esm-bundle/angular__core | ||
| - https://github.com/esm-bundle/angular__common | ||
| - https://github.com/esm-bundle/angular__compiler | ||
| - https://github.com/esm-bundle/angular__platform-browser | ||
| - https://github.com/esm-bundle/angular__platform-browser-dynamic | ||
| - https://github.com/esm-bundle/angular__animations | ||
| - https://github.com/esm-bundle/angular__router | ||
| - https://github.com/esm-bundle/angular__forms | ||
| - https://github.com/esm-bundle/angular__elements | ||
| - https://github.com/esm-bundle/angular__upgrade | ||
| - https://github.com/esm-bundle/angular__service-worker | ||
| - https://github.com/esm-bundle/angular__localize | ||
| You can use the following esm-bundle packages, which provide Ivy-compatible versions and can be shared via SystemJS. These packages are available in the repository provided below: | ||
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| - https://github.com/esm-bundle/angular | ||
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| The single-spa-angular is also available in SystemJS format: | ||
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| - https://github.com/esm-bundle/single-spa-angular | ||
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| Let's imagine that we have 2 Angular applications and the root-config application. Angular applications want to share dependencies. First of all, we need to exclude Angular dependencies from their bundles, this can be done via Webpack `externals` property, but `[email protected]+` has an option that will exclude `rxjs`, `@angular/*` and `single-spa-angular/*` packages: | ||
| Let's imagine that we have 2 Angular applications and a root-config application. The Angular applications want to share dependencies. First, we need to exclude Angular dependencies from their bundles. This can be done using Webpack's `externals` property, but `[email protected]+` offers an option to exclude `rxjs`, `@angular/*`, and `single-spa-angular/*` packages: | ||
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| ```json | ||
| "build": { | ||
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@@ -878,11 +885,11 @@ if (environment.production) { | |
| } | ||
| ``` | ||
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| This is because Angular's `enableProdMode` throws an error when it's called multiple times, but it will be called multiple times when dependencies are shared. `single-spa-angular` calls the original `enableProdMode` but swallows the error. | ||
| This is because Angular's `enableProdMode` throws an error if it is called multiple times. However, when dependencies are shared, it will indeed be called multiple times. `single-spa-angular` calls the original `enableProdMode` but suppresses the error. | ||
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| We also have to consider the platform injector that will be re-used between applications. Angular creates a platform injector when it bootstraps an application; it creates it only once and then re-uses it. Each Angular application has its own platform injector when dependencies are NOT shared and will have a single one when dependencies are shared. This means that `providedIn: 'platform'` services will be a part of the single injector and will be shared between applications. | ||
| We also need to consider the platform injector, which will be reused between applications. Angular creates a platform injector when it bootstraps an application; it is created only once and then reused. Each Angular application has its own platform injector when dependencies are not shared, but will use a single platform injector when dependencies are shared. This means that `providedIn: 'platform'` services will be part of the single injector and thus shared between applications. | ||
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| `single-spa-angular` exports the `getSingleSpaExtraProviders` function that adds `SingleSpaPlatformLocation` to the platform injector. This function should be called in each application (even if that application doesn't use routing). We also have to share the `single-spa-angular` package because applications should reference the same `SingleSpaPlatformLocation` class. Assume that `app1` is created earlier than `app2`, `app1` doesn't call `getSingleSpaExtraProviders()` when bootstrapping the root module, but `app2` does. The platform injector is created eagerly when the `platformBrowser()` is called for the first time. The `app2` will then try to retrieve the `SingleSpaPlatformLocation`, but there's no such injectee within the platform injector since `app1` didn't declare this dependency. | ||
| `single-spa-angular` exports the `getSingleSpaExtraProviders` function, which adds `SingleSpaPlatformLocation` to the platform injector. This function should be called in each application, even if that application doesn't use routing. We also need to share the `single-spa-angular` package because applications should reference the same `SingleSpaPlatformLocation` class. Suppose `app1` is created before `app2`, and `app1` doesn't call `getSingleSpaExtraProviders()` when bootstrapping the root module, but `app2` does. The platform injector is created eagerly when `platformBrowser()` is called for the first time. Consequently, `app2` will try to retrieve the `SingleSpaPlatformLocation`, but it will not be available in the platform injector since `app1` didn't declare this dependency. | ||
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| The root-config should have a SystemJS import map with all of the required packages: | ||
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@@ -895,23 +902,32 @@ The root-config should have a SystemJS import map with all of the required packa | |
| "single-spa": "https://cdnjs.cloudflare.com/ajax/libs/single-spa/5.9.3/system/single-spa.dev.js", | ||
| "rxjs": "https://cdn.jsdelivr.net/npm/@esm-bundle/rxjs/system/es2015/rxjs.min.js", | ||
| "rxjs/operators": "https://cdn.jsdelivr.net/npm/@esm-bundle/rxjs/system/es2015/rxjs-operators.min.js", | ||
| "@angular/compiler": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__compiler/system/es2020/ivy/angular-compiler.js", | ||
| "@angular/core": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__core/system/es2020/ivy/angular-core.js", | ||
| "@angular/common": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__common/system/es2020/ivy/angular-common.js", | ||
| "@angular/common/http": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__common/system/es2020/ivy/angular-http.js", | ||
| "@angular/animations": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__animations/system/es2020/ivy/angular-animations.js", | ||
| "@angular/animations/browser": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__animations/system/es2020/ivy/angular-browser.js", | ||
| "@angular/platform-browser": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__platform-browser/system/es2020/ivy/angular-platform-browser.js", | ||
| "@angular/platform-browser/animations": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__platform-browser/system/es2020/ivy/angular-animations.js", | ||
| "@angular/platform-browser-dynamic": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__platform-browser-dynamic/system/es2020/ivy/angular-platform-browser-dynamic.js", | ||
| "@angular/router": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular__router/system/es2020/ivy/angular-router.js", | ||
| "single-spa-angular/internals": "https://cdn.jsdelivr.net/npm/@esm-bundle/[email protected]/system/es2020/ivy/angular-single-spa-angular-internals.js", | ||
| "single-spa-angular": "https://cdn.jsdelivr.net/npm/@esm-bundle/[email protected]/system/es2020/ivy/angular-single-spa-angular.js" | ||
| "@angular/compiler": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-compiler.js", | ||
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| "@angular/core/primitives/signals": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-core-primitives-signals.js", | ||
| "@angular/core/primitives/event-dispatch": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-core-primitives-event-dispatch.js", | ||
| "@angular/core": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-core.js", | ||
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| "@angular/common": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-common.js", | ||
| "@angular/common/http": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-common-http.js", | ||
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| "@angular/animations": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-animations.js", | ||
| "@angular/animations/browser": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-animations-browser.js", | ||
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| "@angular/platform-browser": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-platform-browser.js", | ||
| "@angular/platform-browser/animations": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-platform-browser-animations.js", | ||
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| "@angular/platform-browser-dynamic": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-platform-browser-dynamic.js", | ||
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| "@angular/router": "https://cdn.jsdelivr.net/npm/@esm-bundle/angular/system/es2022/angular-router.js", | ||
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| "single-spa-angular/internals": "https://cdn.jsdelivr.net/npm/@esm-bundle/[email protected]/system/es2022/single-spa-angular-internals.js", | ||
| "single-spa-angular": "https://cdn.jsdelivr.net/npm/@esm-bundle/[email protected]/system/es2022/single-spa-angular.js" | ||
| } | ||
| } | ||
| ``` | ||
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| Production bundles also don't use `@angular/compiler` and `@angular/platform-browser-dynamic` packages. You would want to use minified packages when the root-config is built in production mode. One approach could be to use `if-else` conditions within the root-config `.ejs` template: | ||
| Production bundles also don't use the `@angular/compiler` and `@angular/platform-browser-dynamic` packages. You should use minified packages when the root configuration is built in production mode. One approach is to use `if-else` conditions within the root configuration `.ejs` template: | ||
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| ```html | ||
| <% if (htmlWebpackPlugin.options.isDevelopment) { %> | ||
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@@ -952,9 +968,9 @@ module.exports = (env, { mode }) => { | |
| }; | ||
| ``` | ||
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| The `mode` will equal production when you run `webpack --mode production`. | ||
| The `mode` will be set to production when you run `webpack --mode production`. | ||
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| The root-config then can load `single-spa`, register applications and start the `single-spa` in order for applications to be mounted: | ||
| The root configuration can then load `single-spa`, register applications, and start `single-spa` so that the applications can be mounted: | ||
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| ```js | ||
| System.import("single-spa").then(({ registerApplication, start }) => { | ||
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