360 lines
8.9 KiB
Markdown
360 lines
8.9 KiB
Markdown
# Setup for local development
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{@a develop-locally}
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The <live-example name=quickstart>QuickStart live-coding</live-example> example is an Angular _playground_.
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It's not where you'd develop a real application.
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You [should develop locally](guide/setup#why-locally "Why develop locally") on your own machine ... and that's also how we think you should learn Angular.
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Setting up a new project on your machine is quick and easy with the **QuickStart seed**,
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maintained [on github](https://github.com/angular/quickstart "Install the github QuickStart repo").
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Make sure you have [node and npm installed](guide/setup#install-prerequisites "What if you don't have node and npm?").
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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** contains the same application as the QuickStart playground.
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But its true purpose is to provide a solid foundation for _local_ development.
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Consequently, there are _many more files_ in the project folder on your machine,
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most of which you can [learn about later](guide/setup-systemjs-anatomy "Setup Anatomy").
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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 title="src/app/app.component.ts" path="setup/src/app/app.component.ts">
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</code-pane>
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<code-pane title="src/app/app.module.ts" path="setup/src/app/app.module.ts">
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</code-pane>
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<code-pane title="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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Right now it declares only the `AppComponent`.
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Soon there will be 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 like Stackblitz.
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You'll learn about alternative compiling and [deployment](guide/deployment) options later in the documentation.
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</td>
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</tr>
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</table>
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<div class="l-sub-section">
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### Next Step
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If you're new to Angular, we recommend you follow the [tutorial](tutorial "Tour of Heroes tutorial").
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</div>
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<br></br><br></br>
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{@a install-prerequisites}
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## Appendix: node and npm
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Node.js and npm are essential to modern web development with Angular and other platforms.
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Node powers client development and build tools.
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The _npm_ package manager, itself a _node_ application, installs JavaScript libraries.
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<a href="https://docs.npmjs.com/getting-started/installing-node" target="_blank" title="Installing Node.js and updating npm">
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Get them now</a> if they're not already installed on your machine.
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**Verify that you are running node `v4.x.x` or higher and npm `3.x.x` or higher**
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by running the commands `node -v` and `npm -v` in a terminal/console window.
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Older versions produce errors.
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We recommend [nvm](https://github.com/creationix/nvm) for managing multiple versions of node and npm.
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You may need [nvm](https://github.com/creationix/nvm) if you already have projects running on your machine that
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use other versions of node and npm.
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{@a why-locally}
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## Appendix: Why develop locally
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<live-example title="QuickStart Seed in Stackblitz">Live coding</live-example> in the browser is a great way to explore Angular.
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Links on almost every documentation page open completed samples in the browser.
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You can play with the sample code, share your changes with friends, and download and run the code on your own machine.
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The [QuickStart](guide/quickstart "Angular QuickStart Playground") shows just the `AppComponent` file.
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It creates the equivalent of `app.module.ts` and `main.ts` internally _for the playground only_.
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so the reader can discover Angular without distraction.
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The other samples are based on the QuickStart seed.
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As much fun as this is ...
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* you can't ship your app in Stackblitz
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* you aren't always online when writing code
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* transpiling TypeScript in the browser is slow
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* the type support, refactoring, and code completion only work in your local IDE
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Use the <live-example title="QuickStart Seed in Stackblitz">live coding</live-example> environment as a _playground_,
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a place to try the documentation samples and experiment on your own.
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It's the perfect place to reproduce a bug when you want to
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<a href="https://github.com/angular/angular/issues/new" title="File a documentation issue">file a documentation issue</a> or
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<a href="https://github.com/angular/angular/issues/new" title="File an Angular issue">file an issue with Angular itself</a>.
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For real development, we strongly recommend [developing locally](guide/setup#develop-locally).
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## Appendix: develop locally with IE
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If you develop angular locally with `ng serve`, there will be `websocket` connection being setup automatically between browser and local dev server, so when your code change, 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 if IE was refreshed manunally or automatically by `ng serve`, sometimes, the websocket will not close properly, when websocket connections exceed limitations, `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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