redocly-cli/docs/commands/preview-docs.md

preview-docs

Introduction

With this command, you can generate documentation previews for API descriptions on your local machine.

If you have a license key or API key configured, the output is a preview of the premium Redocly API reference docs. Otherwise, it is a preview of Redoc community edition.

{% admonition type="success" name="Tip" %} To preview docs using the premium Redocly API reference docs, you must first authenticate to the API registry with the login command. {% /admonition %}

Usage

redocly preview-docs <api>
redocly preview-docs <api> [--config=<path>] [--port=<value>] [--host=<host>]
redocly preview-docs <api> [--force] [--help] [--version]
redocly preview-docs <api> --version

Options

Option	Type	Description
api	string	Path to the API description filename or alias that you want to generate the preview for. Refer to the api section for more options.
--config	string	Specify path to the configuration file.
--force, -f	boolean	Generate preview output even when errors occur.
--help	boolean	Show help.
--host, -h	string	The host where the documentation preview can be accessed. The default value is 127.0.0.1.
--lint-config	string	Specify the severity level for the configuration file. Possible values: warn, error, off. Default value is warn.
--port, -p	integer	The port where the documentation preview can be accessed. You can set any port number over 1024 as long as it is not already being used. The default value is port 8080.
--skip-decorator	[string]	Ignore certain decorators.
--skip-preprocessor	[string]	Ignore certain preprocessors.
--use-community-edition	boolean	Use Redoc Community Edition for docs preview.
--version	boolean	Show version number.

Examples

Api

The command behaves differently depending on how you pass the api to it, and whether the configuration file exists.

Pass api directly

redocly preview-docs openapi/openapi.yaml

In this case, preview-docs previews the API description that was passed to the command. The configuration file is ignored.

Pass api alias

Instead of a full path, you can use an API name from the apis section of your Redocly configuration file. {% tabs %} {% tab label="Command" %}

redocly preview-docs core@v1

{% /tab %} {% tab label="Configuration file" %}

apis:
  core@v1:
    root: ./openapi/api-description.json

{% /tab %} {% /tabs %}

In this case, after resolving the path behind the core@v1 name (see the Configuration file tab), preview-docs generates a preview of the api-description.json file. For this approach, the Redocly configuration file is mandatory.

Custom configuration file

By default, the CLI tool looks for the Redocly configuration file in the current working directory. Use the optional --config argument to provide an alternative path to a configuration file.

redocly preview-docs --config=./another/directory/config.yaml

Custom port for preview

By default, without using the port option, the preview starts on port 8080, so you can access the docs at http://localhost:8080

To specify a custom port for the preview, pass the desired value using either short or long option format: {% tabs %} {% tab label="Short format" %}

redocly preview-docs -p 8888 openapi/openapi.yaml

{% /tab %} {% tab label="Long format" %}

redocly preview-docs -port 8888 openapi/openapi.yaml

{% /tab %} {% /tabs %}

Both commands start the preview on port 8888, so you can access the docs at http://localhost:8888.

Custom host for preview

By default, without using the host option, the preview starts on host 127.0.0.1, so you can access the docs at http://127.0.0.1:8080 or http://localhost:8080.

To specify a custom host for the preview, pass the desired value using either short or long option format: {% tabs %} {% tab label="Short format" %}

redocly preview-docs -h 0.0.0.0 openapi/openapi.yaml

{% /tab %} {% tab label="Long format" %}

redocly preview-docs --host 0.0.0.0 openapi/openapi.yaml

{% /tab %} {% /tabs %}

Both commands start the preview on host 0.0.0.0, so you can access the docs at http://0.0.0.0:8080

Skip preprocessor or decorator

You may want to skip specific preprocessors, rules, or decorators upon running the command. {% tabs %} {% tab label="Skip preprocessors" %}

redocly preview-docs --skip-preprocessor=discriminator-mapping-to-one-of --skip-preprocessor=another-example

{% /tab %} {% tab label="Skip decorators" %}

redocly preview-docs --skip-decorator=generate-code-samples --skip-decorator=remove-internal-operations

{% /tab %} {% /tabs %}