sanic/guide/content/en/plugins/sanic-ext/getting-started.md

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# Getting Started
Sanic Extensions is an *officially supported* plugin developed, and maintained by the SCO. The primary goal of this project is to add additional features to help Web API and Web application development easier.
## Features
- CORS protection
- Template rendering with Jinja
- Dependency injection into route handlers
- OpenAPI documentation with Redoc and/or Swagger
- Predefined, endpoint-specific response serializers
- Request query arguments and body input validation
- Auto create `HEAD`, `OPTIONS`, and `TRACE` endpoints
## Minimum requirements
- **Python**: 3.8+
- **Sanic**: 21.9+
## Install
The best method is to just install Sanic Extensions along with Sanic itself:
```bash
pip install sanic[ext]
```
You can of course also just install it by itself.
```bash
pip install sanic-ext
```
## Extend your application
Out of the box, Sanic Extensions will enable a bunch of features for you.
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To setup Sanic Extensions (v21.12+), you need to do: **nothing**. If it is installed in the environment, it is setup and ready to go.
This code is the Hello, world app in the [Sanic Getting Started page](../../guide/getting-started.md) _without any changes_, but using Sanic Extensions with `sanic-ext` installed in the background.
.. column::
```python
from sanic import Sanic
from sanic.response import text
app = Sanic("MyHelloWorldApp")
@app.get("/")
async def hello_world(request):
return text("Hello, world.")
```
.. column::
**_OLD DEPRECATED SETUP_**
In v21.9, the easiest way to get started is to instantiate it with `Extend`.
If you look back at the Hello, world app in the [Sanic Getting Started page](../../guide/getting-started.md), you will see the only additions here are the two highlighted lines.
.. column::
```python
from sanic import Sanic
from sanic.response import text
from sanic_ext import Extend
app = Sanic("MyHelloWorldApp")
Extend(app)
@app.get("/")
async def hello_world(request):
return text("Hello, world.")
```
Regardless of how it is setup, you should now be able to view the OpenAPI documentation and see some of the functionality in action: [http://localhost:8000/docs](http://localhost:8000/docs).