Angular 9 现已推出 - Ivy 已抵达！link

Version 9 of Angular Now Available — Project Ivy has arrived!

Angular 的 9.0.0 版本发布了！这是一个跨平台的主版本，包括框架、Angular Material 和 CLI。这个版本默认会把应用程序切换到 Ivy 编译器和运行时，并改进了组件测试方法。

The 9.0.0 release of Angular is here! This is a major release that spans the entire platform, including the framework, Angular Material, and the CLI. This release switches applications to the Ivy compiler and runtime by default, and introduces improved ways of testing components.

这是 Angular 在过去 3 年中所做的最重大更新之一，我们很高兴能通过各种方式帮助开发人员构建出更好的应用并为 Angular 生态系统做出贡献。

This is one of the biggest updates to Angular we’ve made in the past 3 years, and we’re excited for all of the ways it empowers developers to build better applications and contribute to the Angular ecosystem.

如何更新到版本 9link

How to update to version 9

访问 update.angular.io，获取详细信息和升级指导。为了获得最佳的更新体验，我们建议你先升级到 Angular 8 的最终版。

Visit update.angular.io for detailed information and guidance. To have the best update experience, we recommend you first update to the final release of Angular 8.

首先，更新到 8 的最新版本

First, update to the latest version of 8

ng update @angular/cli@8 @angular/core@8

然后，升级到 9

Then, update to 9

ng update @angular/cli @angular/core

要查看使用此更新内容的关键修改（包括已弃用了哪些 API），请参阅 Angular 文档中的“更新到 Angular 9 ”。

To review the key changes with this update, including deprecated APIs, see Updating to Angular version 9 in the Angular documentation.

Ivy（常春藤）link

Ivy

默认情况下，版本 9 会把所有的应用程序迁移成使用 Ivy 编译器和运行时的。除了数以百计的 bug 修复之外，Ivy 编译器和运行时还提供了许多优点：

Version 9 moves all applications to use the Ivy compiler and runtime by default. In addition to hundreds of bug fixes, the Ivy compiler and runtime offers numerous advantages:

• 打包尺寸更小

  Smaller bundle sizes

• 测试速度更快

  Faster testing

• 更好的调试

  Better debugging

• 改进了 CSS 类和样式绑定

  Improved CSS class and style binding

• 改进了类型检查

  Improved type checking

• 改进了构建错误

  Improved build errors

• 缩短了构建时间，默认启用了 AOT

  Improved build times, enabling AOT on by default

• 改进了国际化支持

  Improved Internationalization

下面是一些比较值得注意的改进项。

Here’s a breakdown of some of the more notable improvements.

打包尺寸更小link

Smaller bundle sizes

Ivy 编译器的设计目的是删除那些无法通过摇树优化使用的 Angular 部件，并为每个 Angular 组件生成更少的代码。

The Ivy compiler has been designed to remove parts of Angular that aren’t being used via tree-shaking and to generate less code for each Angular component.

通过这些改进，小型应用和大型应用可以节省大量成本。

With these improvements, small apps and large apps can see the most dramatic size savings.

• 那些没用多少 Angular 特性的小应用从摇树优化中受益最多。

  Small apps that don’t use many Angular features can benefit most from tree-shaking.

• 包含很多组件的大型应用从减小的工厂函数体积中受益最多。

  Large apps with many components can benefit most from the reduced factory size.

• 中等大小应用的包体积可能只会小一点点，因为它们从摇树优化中受益较少，并且没有足够的组件从减小的工厂函数体积中受益。

  Medium-sized apps should see bundle sizes that are on par or slightly smaller, since they benefit less from tree-shaking and don’t have enough components to truly leverage smaller factories.

测试速度更快link

Faster testing

我们还改进了 Ivy 中 TestBed 的实现，以提高效率。

We have also revamped the implementation of TestBed in Ivy to make it more efficient.

以前，TestBed 会在运行每个测试之间重新编译所有组件，而不管组件是否有任何变化（例如，通过覆写）。

Previously, TestBed would recompile all components between the running of each test, regardless of whether there were any changes made to components (for example, through overrides).

在 Ivy 中，除非已经手动覆盖了一个组件，否则 TestBed 不会在这些测试之间重新编译组件，这样就可以避免大多数测试间的重新编译。

In Ivy, TestBed doesn’t recompile components between tests unless a component has been manually overridden, which allows it to avoid recompilation between the grand majority of tests.

有了这项更改，框架的核心验收测试速度提高了大约 40％。我们期待用户自己的应用测试速度也能提高 40-50％左右。

With this change, the framework’s core acceptance tests are about 40% faster. We would expect users to see their own application test speeds to be around 40–50% faster.

更好的调试link

Better debugging

Ivy 为你提供了更多调试应用的工具。当我使用 Ivy 运行时在开发模式下运行应用时，我们现在提供了新的全局对象 ng 来进行调试。

Ivy provides you with more tools to debug your applications. When running an application in Dev Mode with the Ivy runtime, we now offer the new [ng](https://v9.angular.io/api/core/global) object for debugging.

• 你可以要求 Angular 访问你的组件、指令等实例

  You can ask Angular for access to instances of your components, directives, and more

• 你可以手动调用各个方法并更新状态

  You can manually call methods and update state

• 如果要查看变更检测的结果，可以使用 applyChanges 来触发变更检测

  When you want to see the results of change detection, you can trigger change detection with applyChanges

Ivy 还改进了用于调试问题的调用栈跟踪，比如 ExpressionChangedAfterItHasBeenCheckedError 。以前堆栈跟踪可能没多少帮助：

Ivy also improves the stack trace for debugging issues such as the ExpressionChangedAfterItHasBeenCheckedError. Previously the stack trace could be unhelpful:

在 Ivy 中，你可以看到一个更实用的调用栈跟踪，它允许你直接从一个已更改的表达式跳转到模板指令。

With Ivy, you see a more useful stack trace that allows you to jump directly to the template instruction with the expression that has changed.

例如，如果在上面的堆栈跟踪中单击 AppComponent_Template，就可以在生成的代码中看到抛出该错误的具体代码行：

For example, if you click on AppComponent_Template in the stack trace above, you can see the specific line in the generated code where the error is being thrown:

如果愿意，你还可以进入任何一个框架指令，来了解框架是如何创建或更新你的组件的。

If you’re so inclined, you can also step into any of these framework instructions to walk through how the framework creates or updates your components.

改进了 CSS 类和样式绑定link

Improved CSS class and style binding

Ivy 编译器和运行时改进了处理样式的方式。以前，如果一个应用程序包含了对某种样式的竞争性定义，那些样式就会破坏性地相互覆盖。在 Ivy 中，样式将以可预测的方式合并在一起。

The Ivy compiler and runtime provides improvements for handling styles. Previously, if an application contained competing definitions for a style, those styles would destructively replace each other. With Ivy, the styles are merged in a predictable way.

考虑下面的模板和组件片段：

Consider the following template and component snippets:

<my-component style="color:red;" [style.color]="myColor" [style]="{color: myOtherColor}" myDirective></div>

@Component({
  host: {
    style: "color:blue"
  },...
})
...

@Directive({
  host: {
    style: "color:black",
    "[style.color]": "property"
  },...
})
...

以前，被最后计算出的那种绑定会胜出，而这可能取决于对这些表达式的修改时机。而如果 myColor 和 myOtherColor 都是未定义的，静态的'red'样式就会被忽略。

Previously, whichever binding was evaluated last would win, and this could depend on the timing of changes to these expressions. If myColor and myOtherColor both were undefined, the static ‘red’ style would be ignored.

在版本 9 中，你可以通过一个清晰、一致的优先顺序来管理你的样式，而这些顺序与时间无关。最具体的样式始终具有最高的优先级。例如，对 [style.color] 的绑定会覆盖 [style] 中的同名绑定。

With version 9, you can manage your styles through a clear, consistent order of precedence that isn’t dependent on timing. The most specific styles always have the highest precedence. For example, a binding to [style.color] overrides a conflicting binding to [style].

但是，出于向后兼容性的考虑，我们仍然把 [ngStyle] 和 [ngClass] 的绑定行为保持原样。也就是说，它们的绑定值发生变化时，新值会覆盖任何竞争性绑定。

However, for backwards compatibility reasons, we have left [ngStyle] and [ngClass] bindings behavior the same as before. When their binding values are updated, the new values will override any competing bindings.

你可以在文档中的模板语法一章阅读更多关于样式优先级规则的内容。

You can read more about styling precedence rules in the Template Syntax guide in the documentation.

作为样式重构的一个额外收获，你现在也可以绑定 CSS 自定义属性（也叫 CSS 变量）了。

As a side effect of the styling refactoring, you can now also bind to CSS custom properties (also known as CSS variables).

<div [style. -- main-border-color]=" '#CCC' ">
<p style="border: 1px solid var(--main-border-color)">hi</p>
</div>

改进了类型检查link

Improved type checking

Angular 编译器可以检查应用中的更多类型，还可以应用更严格的规则。这些特性可以帮助你和你的团队在开发过程的早期阶段发现 bug。

The Angular compiler can check more of the types of your application, and it can apply more strict rules. These features will help you and your team catch bugs earlier in the development process.

除默认值外，我们还支持两个主要的标志来进行额外的类型检查：

We support two main flags for additional type checks in addition to the default.:

• fullTemplateTypeCheck - 激活这个标志会告诉编译器要检查你模板中的所有内容（ ngIf ， ngFor ， ng-template 等）

  fullTemplateTypeCheck — Activating this flag tells the compiler to check everything within your template (ngIf, ngFor, ng-template, etc)

• strictTemplates - 激活这个标志会在类型检查中使用最严格的类型系统规则。

  strictTemplates — Activating this flag will apply the strictest Type System rules for type checking.

要了解有关模板类型检查选项的更多信息，请参阅文档中的模板类型检查指南 。

To learn more about template type checking options, see the Template type checking guide in the documentation.

改进了构建错误link

Improved build errors

新的 Ivy 编译器不仅运行速度更快、有更强大的类型安全性，而且还能让所有的错误信息更容易阅读。

The new Ivy compiler is not only faster and offers stronger type safety, it also makes all of the error messages easier to read.

在版本 8 或 View Engine 中，典型的编译器错误如下所示：

In version 8 or View Engine, a typical compiler error would look like the following:

在使用 Ivy 的 9 版本中，同样的错误如下：

In version 9 with Ivy, the same error looks like:

缩短了构建时间，默认启用了预先编译器（AOT）link

Improved build times, enabling Ahead-of-Time compiler on by default

感谢 Ivy 的新架构，我们对编译器的性能做了很大的改进。

Thanks to Ivy’s new architecture, we’ve made significant improvements to the compiler’s performance.

我们会根据应用中普通的 TypeScript 编译开销来衡量编译器的性能。对于我们的文档应用（angular.io）来说，使用 Ivy 时，这个开销从 0.8 倍减少到了 0.5 倍，提升了近 40％。

We measure our compiler’s performance in terms of the overhead on top of a plain TypeScript compilation of an application. For our documentation app (angular.io), this overhead decreased from 0.8x to 0.5x with Ivy, an improvement of nearly 40%.

这些改进意味着 AOT 构建的速度可以显著加快。感谢这次加速，我们第一次在开发模式下使用 AOT。这意味着 ng serve 现在可以从与构建时相同的编译期检查中获益，从而大大提高了 Angular 的开发体验。

These improvements mean that AOT builds can be noticeably faster. Thanks to this speedup, for the first time ever we’re using AOT even for dev-mode builds. This means that ng serve now benefits from the same compile-time checking as production builds, significantly improving the developer experience for Angular.

由于编译器和运行时都发生了变化，我们也不再需要 [entryComponents](https://angular.cn/guide/deprecations#entryComponents) 。这些组件全都会根据用途被自动发现和编译。

Thanks to the changes in the compiler and runtime, we also no longer require [entryComponents](https://v9.angular.io/guide/deprecations#entryComponents). These components will be discovered and compiled automatically by their usage.

改进了国际化支持（i18n）link

Improved internationalization (i18n)

国际化已经成为 Angular 的核心特性，你可以在每个语言环境中构建一次应用，并收获高度优化的本地化应用。在 9.0 中，我们通过把 i18n 的工作移到构建过程的后期实现了这一目标。这种变化让我们能把它提速 10 倍。

Internationalization has been a core feature of Angular, where you could build your application once per locale and receive highly optimized and localized applications. In 9.0, we’re making this faster by moving the build-time i18n substitutions later in the build process. This change allowed us to make it up to 10 times faster.

阅读更多 以了解关于新 i18n 中 @angular/localize 和新的 angular.json 配置的信息。

Read more about the new i18n: @angular/localize and the new angular.json configuration.

版本 9 还有其它一些改进link

Other improvements with version 9

该团队还努力工作，不断提升使用 Angular 的全部体验。

The team has also been hard at work continuing to improve the full experience of using Angular.

更可靠的 ng updatelink

More reliable ng update

我们对 ng update 工作方式进行了一些修改，以提高它的可靠性和信息量。

We’ve made some changes to how ng update works to make it more reliable and informative.

• 始终使用最新的 CLI。从 CLI 的 8.3.19 版本开始，我们现在在升级过程中使用了 TARGET 版本的 CLI。这意味着，在未来，更新将始终由最新的 CLI 自动处理。

  Always use the latest CLI. Starting with 8.3.19 of the CLI, we now use the CLI from the update TARGET version during updates. This means that, going forward, updates will always be handled by the latest CLI automatically.

• 进度更新更清晰。ng update 现在做了更多的工作来告诉你幕后的情况。对于每次迁移，你都会看到迁移中的更多信息。

  Clearer progress updates. ng update now does more to tell you what is going on under the hood. For each migration, you’ll see information about the migration.

• 更容易对更新进行调试。 默认情况下，ng update 运行所有迁移，并在磁盘上留下最终结果更改供你检查。版本 9 的更新还引入了新的 --create-commits 标志。当你运行 ng update --create-commits 时，该工具会在每个迁移动作后提交代码库的状态，这样你就可以逐步理解或调试我们对代码所做的更改。

  Easier update debugging. By default, ng update runs all of the migrations and leaves the aggregate changes on disk for you to inspect. The version 9 update also introduces the new **--create-commits** flag. When you run ng update --create-commits, the tool commits the state of your codebase after each migration, so you can step through and understand or debug the changes we are making to your code.

providedIn 的新选项link

New options for _providedIn

当你在 Angular 中创建一个 @Injectable 服务时，你必须选择它应该添加到注入器的什么位置。除了以前的 root 和模块这两种选项之外，还有两个新选项。

When you create an @Injectable service in Angular, you must choose where it should be added to the injector. In addition to the previous root and module options, you have two additional options.

• platform - 指定 providedIn: 'platform' 可以在一个特殊的单例平台注入器中使用该服务，该注入器由该页面上的所有应用共享。

  platform — Specifying providedIn: 'platform' makes the service available in a special singleton platform injector that is shared by all applications on the page.

• any - 在每个注入该令牌的模块（包括惰性加载模块）中提供一个唯一的实例。

  any— Provides a unique instance in every module (including lazy modules) that injects the token.

请到我们的 API 文档中了解详情 。

Learn more about providedIn in our API documentation.

组件的测试挽具link

Component harnesses

历史上，测试组件一直靠 CSS 选择器这样的实现细节来查找组件和触发事件。这意味着只要组件库改变了它的实现，就需要更新依赖这些组件的所有测试。

Testing components has historically relied on using implementation details such as CSS selectors to find components and to trigger events. This meant that whenever a component library changed its implementation, all of the tests relying on those components would need to be updated.

在版本 9 中，我们引入了组件的测试挽具，它提供了另一种测试组件的方法。通过抽象出实现细节，你可以确保你的单元测试被正确的局部化，而且不那么脆弱。

In version 9, we are introducing component harnesses, which offer an alternative way to test components. By abstracting away the implementation details, you can make sure your unit tests are correctly scoped and less brittle.

现在，Angular Material 的大多数组件都可以通过这些挽具进行测试，而且我们还会把这些挽具作为组件开发套件 （CDK）的一部分提供给任何一位组件作者。

Most of Angular Material’s components can now be tested via harnesses, and we are making harnesses available to any component author as part of the Component Dev Kit (CDK).

这是一个在使用组件挽具之前的一个测试范例：

Here’s an example test before harnesses:

it("should switch to bug report template", async () => {
  expect(fixture.debugElement.query("bug-report-form")).toBeNull();
  const selectTrigger = fixture.debugElement.query(
    By.css(".mat-select-trigger")
  );
  selectTrigger.triggerEventHandler("click", {});
  fixture.detectChanges();
  await fixture.whenStable();
  const options = document.querySelectorAll(".mat-select-panel mat-option");
  options[1].click(); // Click the second option, "Bug".
  fixture.detectChanges();
  await fixture.whenStable();
  expect(fixture.debugElement.query("bug-report-form")).not.toBeNull();
});

而用组件挽具做同样的测试如下：

And the same test with harnesses:

it("should switch to bug report template", async () => {
  expect(fixture.debugElement.query("bug-report-form")).toBeNull();
  const select = await loader.getHarness(MatSelect);
  await select.clickOptions({ text: "Bug" });
  expect(fixture.debugElement.query("bug-report-form")).not.toBeNull();
});

了解更多关于 Material 的组件测试挽具或用 CDK 构建你自己的挽具。

Learn more about Material’s component harnesses or building your own with the CDK.

新的组件link

New components

你现在可以在应用中添加来自 YouTube 和谷歌地图的功能了。

You can now include capabilities from YouTube and Google Maps in your applications.

• 你可以使用全新的 youtube-player ，在你的应用中内嵌 YouTube 播放器。当你加载了 YouTube 的 IFrame 播放器 API 之后，这个组件就会利用它。

  You can render a YouTube Player inline within your application with the new youtube-player. After you load the YouTube IFrame player API, this component will take advantage of it.

• 我们还推出了 google-maps 组件。利用这些组件，你可以轻松地渲染谷歌地图，显示地标，并像普通的 Angular 组件一样与其交互，让你无需学习完整的 Google Maps API 即可使用。

  We are also introducing google-maps components. These components make it easy to render Google Maps, display markers, and wire up interactivity in a way that works like a normal Angular component, saving you from needing to learn the full Google Maps API.

IDE 和语言服务改进link

IDE & language service improvements

Visual Studio Marketplace 上的 Angular 语言服务扩展已做了重大改进。随着对性能和稳定性问题的重大架构变革，许多长期存在的漏洞也得到了修复。还包括一些新特性：

Significant improvements have been made to the Angular language service extension on the Visual Studio Marketplace. Along with major architectural overhaul to address performance and stability issues, many long-standing bugs have also been fixed. Besides that, some new features include:

• Angular 模板语法的 TextMate 语法定义，现在可以在内联和外部模板中启用语法高亮显示了

  TextMate grammar for Angular Template Syntax, which now enables syntax highlighting in both inline and external templates

• 针对 templateUrl 和 styleUrls 的“转到定义”功能

  “Go to definition” for templateUrl and styleUrls

• 悬浮工具提示中的 NgModule 和类型信息

  NgModule and type information in hover tooltip

TypeScript 3.7 支持link

TypeScript 3.7 support

Angular 已经更新，可以用 TypeScript 3.6 和 3.7 了，也包括 TypeScript 3.7 中非常受欢迎的可选串联（optional chaining）特性。为了与生态系统保持同步，我们还更新了其他生态系统依赖的版本，比如 Zone.JS 和 RxJS。

Angular has been updated to work with TypeScript 3.6 and 3.7, including the extremely popular optional chaining feature in TypeScript 3.7. To stay in sync with the ecosystem, we’ve also updated our version of other ecosystem dependencies such as Zone.JS and RxJS.

谢谢社区link

Thank you to the community

这个版本是两年多来工作的结晶。我们对这项工作的未来及其无限可能感到非常兴奋。如果没有社区数百人的努力，这是不可能实现的。

This release is the culmination of over 2 years of work. We’re really excited about the future and possibilities that this work opens up. This wouldn’t be possible without the work of hundreds of people in the community.

v9 贡献者：

Aaron Frost, Adam J. Penn, Adam Plumer, Adam Vigneaux, Adrien Crivelli, Ajit Singh, Alain Chautard, Alan Agius, Alexander Ivanov, Alexander von Weiss, Alex Eagle, Alex Rickabaugh, alexzuza, Ali Mirlou, Alison Gale, Alyssa Nicoll, Amadou Sall, AMarinov, Amit Dubey, Anders Kjær Damgaard, Andrew Kushnir, Andrew Scott, Andrew Seguin, Andrius, Andrus Diaz, Ankit Prajapati, Aravind, Aristeidis Bampakos, Arne Hoek, Artur Androsovych, arturovt, Atef Ben Ali, Ayaz Hafiz, Ben Elliott, Benjamin Liii, Brian Michalski, CaerusKaru, Carlos Ortiz García, Cédric Exbrayat, Charles Lyding, Christian Liebel, Christopher Dahm, codingnuclei, Colum Ferry, Craig Spence, cran-cg, crisbeto, Cyrille Tuzi, Daniele Morosinotto, Daniel Waxweiler, Danny Skoog, David Sánchez, David Shevitz, Denis Omelkov, Denys Vuika, Diego Juliao, dishanfernando, Dmitri Ischenko, Dominik Pieper, Do Nhu Vy, Doug Parker, Dyma, EddyP23, Edy Segura, Eliran Eliassy, Elvis Begovic, Emmanuel DEMEY, Ephraim, Erik Pintar, Esteban Gehring, Eusen, Evan Martin, FabianGosebrink, FaustmannChr, FDIM, Ferdinand Malcher, FG-33, Filipe Silva, Gabor Szekely, Gabriel Medeiros Coelho, GavinMK, Geoff Bass, George Kalpakas, Gérôme Grignon, ghiscoding, Girma Nigusse, Greg Magolan, Grigoriy Beziuk, hafiz, Harinder Singh, Hayouung, Hoel IRIS, horn, idzark, Igor Minar, Issei Horie, ivanwonder, Jakub Pawlot, James Vickery, Jan Malchert, Jason Bedard, Jeff Held, Jennifer Fell, Jeremy Elbourn, JiaLiPassion, Jithil P Ponnan, jnavb, Joakim Zebic, Joey Perrott, john li, John Ralph Umandal, Jonathan Sharpe, Joost Koehoorn, Jordan Amman, Jordan Nelson, Joshua Colvin, Judy Bogart, J Z, Kai Röder, Kapunahele Wong, Kara Erickson, katryo, Kayla Altepeter, Keen Yee Liau, ketangote, Kirk Larkin, Koala, Kristina Gocheva, kristinavavrova, Kristiyan Kostadinov, Kwinten Pisman, Kyle J. Kemp, Lars Gyrup Brink Nielsen, LASLEDJ, lazarljubenovic, Leonardo Zizzamia, Leon Radley, Luka Petrovic, Mansour Fall, manzonif, Mark Goho, Martina Kraus, Martin Probst, Matias Niemelä, Matthew Harris, Matt Janssen, Mayur Barge, mbehrlich, mertdeg2, Michael Maier, Michael Nahkies, Michael Prentice, Michał Koziara, Mike Brocchi, Mike Casebolt, mikef, Miles Malerba, Minko Gechev, Mirco Widmer, Misko Hevery, Miško Hevery, Mitchell Skaggs, mohax, Muhammad Umair, Muhammad Umair Khan, Nathan Tate, Németh Tamás, Nicolas Villanueva, Nikita Potapenko, Niklas Merz, noeri, Noopur, NothingEverHappens, ODAVING, Olegas Goncarovas, Olivier Combe, Orlando Pozo, owenmecham, Pascal Fivian, paulceli, Paul Gschwendtner, Pawel Kozlowski, Pete Bacon Darwin, Phaneendra, philonor, Pierre-Yves FARE, Piotr Błażejewicz, Potapy4, Rado Kirov, Ralf D. Müller, Raz Luvaton, Reuben Wilson, Richard Lea, Rick Katka, Robert Coie, Robin Dupret, Roy, Rudar Daman Singla, Rustam, Sachin, Sahan Serasinghe, Sam Julien, Santosh Yadav, Sasha Rudan, Sergey Koshechkin, Sergey Nikitin, Shibasish, Sholka Jadav, Showtim3, ShubhrankR, Simon Jespersen, Simon Kurtz, skrikl, Smartin, Sonu Kapoor, Srichandradeep Choudarapu, Sriram Jayarman, Stefanie Fluin, Stephen Cooper, Stephen Fluin, Suguru Inatomi, Suresh918, Syu Kato, thanhpd, thekiba, TheMushr00m, Tiep Phan, Timar, Tim Deschryver, TinyMan, Tom Kwong, Tom Sullivan, Trevor Karjanis, Troels Lenda, Turtuvshin Byambaa, Vanessa Schmitt, Victor, Vikash Dahiya, Vikram Subramanian, Wagner Maciel, Wataru Kasahara, Wenqi, why520crazy, willbeaufoy, William Lohan, WreckItRalph, Yann Bertrand, Younes Jaaidi, Yulia Tsareva, Zaid Al-Omari, zuckjet, 陈旭.

v9 Contributors:

我们还要感谢我们的 GDE 和整个社区。我们收到的反馈、问题报告和问题重现项目（Reproductions）对于让我们的工作达到最高质量标准至关重要。使用版本 9 的公开 Angular 应用已经超过了 4000 个。

We would also like to thank our GDEs and the community at large. The feedback, issue reports, and reproductions we receive are essential to holding our work to the highest quality standards. There are already over 4000 public Angular apps using version 9.

特别要感谢我们的长期企业合作伙伴 Pawel Kozlowski 和他的赞助商 Amadeus。在 Ivy 项目的两年时间里，Pawel 以极高的品质做出了巨大的贡献，这是该项目成功的关键部分。

Special thanks to our long term enterprise collaborator Pawel Kozlowski and his sponsor Amadeus. Pawel made a huge quantity of contributions with exceptional quality over the 2 years of the Ivy project that have been a critical part of the project’s success.

如果您对本次发布有任何意见和建议，请提出 Issue ，或者告诉我们 ！

If you have feedback on this release, please file an issue, or let us know!