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A Gatsby Remark plugin for embedding Codesandbox given a folder of files
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README.md

gatsby-remark-embedded-codesandbox

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This plugin adds support for generting embedded Codesandbox, specifying a folder in local files to populate the contents of it. This enables example code to be stored along side of, and revisioned with, your website content.

This plugin is based on gatsby-remark-code-repls.

Getting started

To embed a Codesandbox editor in you markdown/remark content, simply add a link with the custom protocol pointing to the folder desired folder:

[embedded example](embedded-codesandbox://example/folder)

It will scan the folder and generate the proper html to include the editor.

Overview

For example, given the following project directory structure:

examples/
├── hello-world-example
│   ├── package.json
│   ├── index.html
│   └── index.js
├── some-other-example
│   ├── package.json
│   └── index.js

These example files can be referenced via links in markdown that get transformed to embedded editors. For example:

<!-- before -->

[hello world example](embedded-codesandbox://hello-world-example)

<!-- after -->

<iframe src="https://codesandbox.io/api/v1/sandboxes/define?embed=1&parameters=N4IgZglgNgpgziAXKADgQwMYGs0HMYB0AVnAPYB2SoGFALjObVSOWgLYxIgwAe7KsEAF8hAGhARyAE14EAFrTZRmNRgyaIQAHgVKAfFoBGpKQE8DAemNnLuqHuHjJMnsQTIQq-oy6q4tAAIwUlIAgF4AgB0QQzQAJ2iAbmERIA&query=hidenavigation%3D1%26view%3Dpreview" style="width:100%; height:500px; border:0; border-radius: 4px; overflow:hidden;\\" sandbox="allow-modals allow-forms allow-popups allow-scripts allow-same-origin"></iframe>

Note: If you are using gatsby-remark-responsive-iframe, it must appear after this plugin in your configuration or the iframe will not be transformed.

Package.json file

Codesandbox requires a package.json file in order to work. This is useful because you can define dependencies such as react that will be included in the sandbox.

The plugin will search for the package.json file in the example folder. If not found, it will try in the parent folders up until it reaches the examples root folder.

If nothing is found it fall back to a default one:

{
  "name": "example",
  "dependencies": {}
}

Overriding options on single sandboxes

It's possible to override the global embedding options on a per-sandbox basis, by simply passing them as url query in the generating link.

[hello world example](embedded-codesandbox://hello-world-example?view=split)

The options will be merged with the global one.

How does it work?

CodeSandbox uses the same URL compression schema used by the Babel REPL to embed the local code example in a URL.

This is than passed to the (awesome) define api to generate a sandbox on the fly.

Installation

yarn add gatsby-remark-embedded-codesandbox

Usage

// In your gatsby-config.js
{
  resolve: 'gatsby-transformer-remark',
  options: {
    plugins: [
      {
        resolve: 'gatsby-remark-embedded-codesandbox',
        options: {
          // Required:

          // Example code folders are relative to this dir.
          // eg src/_examples/some-example-folder
          directory: `${__dirname}/src/_examples/`,

          // Optional:

          // Custom protocol for parsing the embedding link
          // default:
          protocol: 'embedded-codesandbox://',

          // Customise Codesandbox embedding options:
          // https://codesandbox.io/docs/embedding#embed-options
          // default:
          embedOptions: {
            view: 'preview',
            hidenavigation: 1,
          },

          // Customise the embedding iframe given the generated url
          // default:
          getIframe: url => `<iframe src="${url}" class="embedded-codesandbox" sandbox="allow-modals allow-forms allow-popups allow-scripts allow-same-origin"></iframe>`
        }
      }
    ]
  }
}
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