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214 lines
5.7 KiB
Markdown
214 lines
5.7 KiB
Markdown
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---
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title: Using the Redoc HTML element
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---
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# Using the Redoc HTML element
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## TL;DR final code example
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<title>Redoc</title>
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<!-- needed for adaptive design -->
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<meta charset="utf-8"/>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link href="https://fonts.googleapis.com/css?family=Montserrat:300,400,700|Roboto:300,400,700" rel="stylesheet">
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<!--
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Redoc doesn't change outer page styles
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-->
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<style>
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body {
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margin: 0;
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padding: 0;
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}
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</style>
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</head>
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<body>
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<redoc spec-url='http://petstore.swagger.io/v2/swagger.json'></redoc>
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<script src="https://cdn.jsdelivr.net/npm/redoc@latest/bundles/redoc.standalone.js"> </script>
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</body>
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</html>
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```
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:::attention Running Redoc locally requires an HTTP server
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Loading local OpenAPI definitions is impossible without running a web server because of issues with
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[same-origin policy](https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy) and
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other security reasons.
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:::
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### Running Redoc locally
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If you want to view your Redoc output locally, you can simulate an HTTP server.
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#### Using Redocly OpenAPI CLI
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Redocly OpenAPI CLI is an open source command-line tool that includes a command
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for simulating an HTTP server to provide a preview of your OpenAPI definition locally.
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If you have [OpenAPI CLI](https://redoc.ly/docs/cli/#installation-and-usage) installed, `cd` into your
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project directory and run the following command:
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```bash
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openapi preview-docs openapi.yaml
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```
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By default, without providing a port, the preview starts on port 8080, and can be accessed at `http://localhost:8080`.
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To exit the preview, use `control+C`.
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#### Using Python
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If you have [Python 3](https://www.python.org/downloads/) installed, `cd` into your
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project directory and run the following command:
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```python
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python3 -m http.server
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```
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If you have [Python 2](https://www.python.org/downloads/) installed, `cd` into your
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project directory and run the following command:
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```python
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python -m SimpleHTTPServer 8000
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```
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The output after entering the command provides the local URL where the preview can be accessed.
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To exit the preview, use `control-C`.
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#### Using Node.js
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If you have [Node.js](https://nodejs.org/en/download/) installed, install `http-server`
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using the following npm command:
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```bash
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npm install -g http-server
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```
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Then, `cd` into your project directory and run the following command:
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```node
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http-server
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```
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The output after entering the command provides the local URL where the preview can be accessed.
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To exit the preview, use `control-C`.
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## Step 1 - Install Redoc
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You can install Redoc using one of the following package managers:
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- [npm](https://docs.npmjs.com/about-npm)
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- [yarn](https://classic.yarnpkg.com/en/docs/getting-started)
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:::attention Initialize your package manager
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If you do not have a `package.json` file in your project directory,
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you need to add one by initializing npm or yarn in your project. Use the command `npm init` for npm,
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or `yarn init` for yarn. These initialization commands will lead you through the process
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of creating a `package.json` file in your project.
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For more information, see
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[Creating a package.json file](https://docs.npmjs.com/creating-a-package-json-file)
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in the npm documentation or [Yarn init](https://classic.yarnpkg.com/en/docs/cli/init/)
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in the yarn documentation.
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:::
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### Install Redoc with yarn
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After navigating to your project directory in your terminal, use the following command:
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```bash
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yarn add redoc
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```
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### Install Redoc with npm
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After navigating to your project directory in your terminal, use the following command:
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```bash
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npm i redoc
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```
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## Step 2 - Reference the Redoc script
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You can reference the Redoc script using either a link to the files hosted on a CDN
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or the files located in your `node modules` folder.
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### CDN link
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To reference the Redoc script with a CDN link:
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```html
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<script src="https://cdn.jsdelivr.net/npm/redoc@latest/bundles/redoc.standalone.js"> </script>
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```
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### Node modules link
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To reference the Redoc script with a node modules link:
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```html
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<script src="node_modules/redoc/bundles/redoc.standalone.js"> </script>
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```
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## Step 3 - Add the <redoc> element
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You can add the <redoc> element to your HTML page and reference your OpenAPI
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definition using the `spec-url` attribute, or you can initialize Redoc using
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a globally exposed Redoc object.
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### Using the `spec-url` attribute
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To add the <redoc> element with the `spec-url` attribute:
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```html
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<redoc spec-url="url/to/your/spec"></redoc>
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```
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#### Examples
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```html
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<redoc spec-url="http://petstore.swagger.io/v2/swagger.json"></redoc>
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```
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You can also use a local file (JSON or YAML) in your project, for instance:
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```html
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<redoc spec-url="dist.json"></redoc>
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```
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### Using a Redoc object
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To add the <redoc> element with a globally exposed Redoc object:
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```js
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Redoc.init(specOrSpecUrl, options, element, callback)
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```
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- `specOrSpecUrl`: Either a JSON object with the OpenAPI definition or a URL to the
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definition in JSON or YAML format.
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- `options`: See [options object](https://redoc.ly/docs/api-reference-docs/configuration/) reference.
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- `element`: DOM element Redoc will be inserted into.
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- `callback`(optional): Callback to be called after Redoc has been fully rendered.
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It is also called on errors with `error` as the first argument.
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#### Examples
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```html
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<script>
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Redoc.init('http://petstore.swagger.io/v2/swagger.json', {
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scrollYOffset: 50
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}, document.getElementById('redoc-container'))
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</script>
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```
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You can also use a local file (JSON or YAML) in your project, for instance:
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```html
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<script>
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Redoc.init('dist.yaml', {
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scrollYOffset: 50
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}, document.getElementById('redoc-container'))
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</script>
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```
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