329 lines
8.5 KiB
Markdown
329 lines
8.5 KiB
Markdown
# Setup for upgrading from AngularJS
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<!--
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Question: Can we remove this file and instead direct readers to https://github.com/angular/quickstart/blob/master/README.md
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-->
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<div class="alert is-critical">
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**Audience:** Use this guide **only** in the context of [Upgrading from AngularJS](guide/upgrade "Upgrading from AngularJS to Angular") or [Upgrading for Performance](guide/upgrade-performance "Upgrading for Performance").
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Those Upgrade guides refer to this Setup guide for information about using the [deprecated QuickStart GitHub repository](https://github.com/angular/quickstart "Deprecated Angular QuickStart GitHub repository"), which was created prior to the current Angular [CLI](cli "CLI Overview").
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**For all other scenarios,** see the current instructions in [Setting up the Local Environment and Workspace](guide/setup-local "Setting up for Local Development").
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</div>
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<!--
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The <live-example name=quickstart>QuickStart live-coding</live-example> example is an Angular _playground_.
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There are also some differences from a local app, to simplify that live-coding experience.
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In particular, the QuickStart live-coding example shows just the AppComponent file; it creates the equivalent of app.module.ts and main.ts internally for the playground only.
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-->
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This guide describes how to develop locally on your own machine.
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Setting up a new project on your machine is quick and easy with the [QuickStart seed on github](https://github.com/angular/quickstart "Install the github QuickStart repo").
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**Prerequisite:** Make sure you have [Node.js® and npm installed](guide/setup-local#prerequisites "Angular prerequisites").
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{@a clone}
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## Clone
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Perform the _clone-to-launch_ steps with these terminal commands.
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<code-example language="sh" class="code-shell">
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git clone https://github.com/angular/quickstart.git quickstart
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cd quickstart
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npm install
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npm start
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</code-example>
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<div class="alert is-important">
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`npm start` fails in _Bash for Windows_ in versions earlier than the Creator's Update (April 2017).
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</div>
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{@a download}
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## Download
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<a href="https://github.com/angular/quickstart/archive/master.zip" title="Download the QuickStart seed repository">Download the QuickStart seed</a>
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and unzip it into your project folder. Then perform the remaining steps with these terminal commands.
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<code-example language="sh" class="code-shell">
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cd quickstart
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npm install
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npm start
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</code-example>
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<div class="alert is-important">
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`npm start` fails in _Bash for Windows_ in versions earlier than the Creator's Update (April 2017).
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</div>
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{@a non-essential}
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## Delete _non-essential_ files (optional)
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You can quickly delete the _non-essential_ files that concern testing and QuickStart repository maintenance
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(***including all git-related artifacts*** such as the `.git` folder and `.gitignore`!).
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<div class="alert is-important">
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Do this only in the beginning to avoid accidentally deleting your own tests and git setup!
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</div>
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Open a terminal window in the project folder and enter the following commands for your environment:
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### OS/X (bash)
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<code-example language="sh" class="code-shell">
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xargs rm -rf < non-essential-files.osx.txt
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rm src/app/*.spec*.ts
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rm non-essential-files.osx.txt
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</code-example>
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### Windows
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<code-example language="sh" class="code-shell">
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for /f %i in (non-essential-files.txt) do del %i /F /S /Q
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rd .git /s /q
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rd e2e /s /q
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</code-example>
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{@a seed}
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## What's in the QuickStart seed?
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The **QuickStart seed** provides a basic QuickStart playground application and other files necessary for local development.
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Consequently, there are many files in the project folder on your machine,
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most of which you can [learn about later](guide/file-structure).
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<div class="alert is-helpful">
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**Reminder:** The "QuickStart seed" example was created prior to the Angular CLI, so there are some differences between what is described here and an Angular CLI application.
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</div>
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{@a app-files}
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Focus on the following three TypeScript (`.ts`) files in the **`/src`** folder.
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<div class='filetree'>
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<div class='file'>
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src
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</div>
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<div class='children'>
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<div class='file'>
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app
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</div>
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<div class='children'>
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<div class='file'>
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app.component.ts
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</div>
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<div class='file'>
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app.module.ts
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</div>
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</div>
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<div class='file'>
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main.ts
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</div>
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</div>
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</div>
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<code-tabs>
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<code-pane header="src/app/app.component.ts" path="setup/src/app/app.component.ts">
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</code-pane>
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<code-pane header="src/app/app.module.ts" path="setup/src/app/app.module.ts">
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</code-pane>
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<code-pane header="src/main.ts" path="setup/src/main.ts">
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</code-pane>
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</code-tabs>
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All guides and cookbooks have _at least these core files_.
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Each file has a distinct purpose and evolves independently as the application grows.
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Files outside `src/` concern building, deploying, and testing your app.
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They include configuration files and external dependencies.
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Files inside `src/` "belong" to your app.
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Add new Typescript, HTML and CSS files inside the `src/` directory, most of them inside `src/app`,
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unless told to do otherwise.
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The following are all in `src/`
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<style>
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td, th {vertical-align: top}
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</style>
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<table width="100%">
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<col width="20%">
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</col>
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<col width="80%">
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</col>
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<tr>
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<th>
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File
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</th>
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<th>
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Purpose
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</th>
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</tr>
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<tr>
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<td>
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<code>app/app.component.ts</code>
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</td>
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<td>
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Defines the same `AppComponent` as the one in the QuickStart playground.
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It is the **root** component of what will become a tree of nested components
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as the application evolves.
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</td>
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</tr>
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<tr>
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<td>
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<code>app/app.module.ts</code>
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</td>
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<td>
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Defines `AppModule`, the [root module](guide/bootstrapping "AppModule: the root module") that tells Angular how to assemble the application.
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When initially created, it declares only the `AppComponent`.
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Over time, you add more components to declare.
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</td>
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</tr>
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<tr>
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<td>
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<code>main.ts</code>
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</td>
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<td>
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Compiles the application with the [JIT compiler](guide/glossary#jit) and
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[bootstraps](guide/bootstrapping)
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the application's main module (`AppModule`) to run in the browser.
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The JIT compiler is a reasonable choice during the development of most projects and
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it's the only viable choice for a sample running in a _live-coding_ environment such as Stackblitz.
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Alternative [compilation](guide/aot-compiler), [build](guide/build), and [deployment](guide/deployment) options are available.
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</td>
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</tr>
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</table>
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## Appendix: Develop locally with IE
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If you develop angular locally with `ng serve`, a `websocket` connection is set up automatically between browser and local dev server, so when your code changes, the browser can automatically refresh.
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In Windows, by default, one application can only have 6 websocket connections, <a href="https://msdn.microsoft.com/library/ee330736%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396#websocket_maxconn" title="MSDN WebSocket settings">MSDN WebSocket Settings</a>.
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So when IE is refreshed (manually or automatically by `ng serve`), sometimes the websocket does not close properly. When websocket connections exceed the limitations, a `SecurityError` will be thrown. This error will not affect the angular application, you can just restart IE to clear this error, or modify the windows registry to update the limitations.
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## Appendix: Test using `fakeAsync()/waitForAsync()`
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If you use the `fakeAsync()/waitForAsync()` helper function to run unit tests (for details, read the [Testing guide](guide/testing-components-scenarios#fake-async)), you need to import `zone.js/dist/zone-testing` in your test setup file.
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<div class="alert is-important">
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If you create project with `Angular/CLI`, it is already imported in `src/test.ts`.
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</div>
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And in the earlier versions of `Angular`, the following files were imported or added in your html file:
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```
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import 'zone.js/dist/long-stack-trace-zone';
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import 'zone.js/dist/proxy';
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import 'zone.js/dist/sync-test';
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import 'zone.js/dist/jasmine-patch';
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import 'zone.js/dist/async-test';
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import 'zone.js/dist/fake-async-test';
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```
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You can still load those files separately, but the order is important, you must import `proxy` before `sync-test`, `async-test`, `fake-async-test` and `jasmine-patch`. And you also need to import `sync-test` before `jasmine-patch`, so it is recommended to just import `zone-testing` instead of loading those separated files.
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