@contentful/rich-text-react-renderer

rich-text-react-renderer

React renderer for the Contentful rich text field type.

Installation

Using npm:

npm install @contentful/rich-text-react-renderer

Using yarn:

yarn add @contentful/rich-text-react-renderer

Usage

import { documentToReactComponents } from '@contentful/rich-text-react-renderer';

const document = {
  nodeType: 'document',
  data: {},
  content: [
    {
      nodeType: 'paragraph',
      data: {},
      content: [
        {
          nodeType: 'text',
          value: 'Hello world!',
          marks: [],
          data: {},
        },
      ],
    },
  ],
};

documentToReactComponents(document); // -> <p>Hello world!</p>

import { documentToReactComponents } from '@contentful/rich-text-react-renderer';

const document = {
  nodeType: 'document',
  content: [
    {
      nodeType: 'paragraph',
      content: [
        {
          nodeType: 'text',
          value: 'Hello',
          marks: [{ type: 'bold' }],
        },
        {
          nodeType: 'text',
          value: ' world!',
          marks: [{ type: 'italic' }],
        },
      ],
    },
  ],
};

documentToReactComponents(document);
// -> <p><b>Hello</b><u> world!</u></p>

You can also pass custom renderers for both marks and nodes as an optional parameter like so:

import { BLOCKS, MARKS } from '@contentful/rich-text-types';
import { documentToReactComponents } from '@contentful/rich-text-react-renderer';

const document = {
  nodeType: 'document',
  content: [
    {
      nodeType: 'paragraph',
      content: [
        {
          nodeType: 'text',
          value: 'Hello',
          marks: [{ type: 'bold' }],
        },
        {
          nodeType: 'text',
          value: ' world!',
          marks: [{ type: 'italic' }],
        },
      ],
    },
  ],
};

const Bold = ({ children }) => <p className="bold">{children}</p>;

const Text = ({ children }) => <p className="align-center">{children}</p>;

const options = {
  renderMark: {
    [MARKS.BOLD]: (text) => <Bold>{text}</Bold>,
  },
  renderNode: {
    [BLOCKS.PARAGRAPH]: (node, children) => <Text>{children}</Text>,
  },
  renderText: (text) => text.replace('!', '?'),
};

documentToReactComponents(document, options);
// -> <p class="align-center"><p class="bold">Hello</p><u> world?</u></p>

Last, but not least, you can pass a custom rendering component for an embedded entry:

import { BLOCKS } from '@contentful/rich-text-types';
import { documentToReactComponents } from '@contentful/rich-text-react-renderer';

const document = {
  nodeType: 'document',
  content: [
    {
      nodeType: 'embedded-entry-block',
      data: {
        target: (...)Link<'Entry'>(...);
      },
    },
  ]
};

const CustomComponent = ({ title, description }) => (
  <div>
    <h2>{title}</h2>
    <p>{description}</p>
  </div>
);

const options = {
  renderNode: {
    [BLOCKS.EMBEDDED_ENTRY]: (node) => {
      const { title, description } = node.data.target.fields;
      return <CustomComponent title={title} description={description} />
    }
  }
};

documentToReactComponents(document, options);
// -> <div><h2>[title]</h2><p>[description]</p></div>

The renderNode keys should be one of the following BLOCKS and INLINES properties as defined in @contentful/rich-text-types:

• BLOCKS

  • DOCUMENT
  • PARAGRAPH
  • HEADING_1
  • HEADING_2
  • HEADING_3
  • HEADING_4
  • HEADING_5
  • HEADING_6
  • UL_LIST
  • OL_LIST
  • LIST_ITEM
  • QUOTE
  • HR
  • EMBEDDED_ENTRY
  • EMBEDDED_ASSET
  • EMBEDDED_RESOURCE

• INLINES

  • EMBEDDED_ENTRY (this is different from the BLOCKS.EMBEDDED_ENTRY)
  • EMBEDDED_RESOURCE
  • HYPERLINK
  • ENTRY_HYPERLINK
  • ASSET_HYPERLINK
  • RESOURCE_HYPERLINK

The renderMark keys should be one of the following MARKS properties as defined in @contentful/rich-text-types:

• BOLD
• ITALIC
• UNDERLINE
• CODE

The renderText callback is a function that has a single string argument and returns a React node. Each text node is evaluated individually by this callback. A possible use case for this is to replace instances of \n produced by Shift + Enter with <br/> React elements. This could be accomplished in the following way:

const options = {
  renderText: (text) => {
    return text.split('\n').reduce((children, textSegment, index) => {
      return [...children, index > 0 && <br key={index} />, textSegment];
    }, []);
  },
};

Note on adding a key prop in custom renderers:

It is possible to pass a key prop in the components returned by custom renderers. A good use case for this is in embeded entries using the node's target.sys.id. It is important not to pass anything that is index-like (e.g. 1 or "1") as it may clash with the default renderers which automatically inject a key prop using their index in the Contentful rich text AST.

To work around this limitation, just append any non-numeric character to your custom key.

const options = {
  renderMark: {
    [MARKS.BOLD]: (text) => {
      return <b key={`${text}-key`}>{text}</b>;
    },
  },
};

Preserving Whitespace

The options object can include a preserveWhitespace boolean flag. When set to true, this flag ensures that multiple spaces in the rich text content are preserved by replacing them with  , and line breaks are maintained with <br /> tags. This is useful for content that relies on specific formatting using spaces and line breaks.

import { documentToReactComponents } from '@contentful/rich-text-react-renderer';

const document = {
  nodeType: 'document',
  content: [
    {
      nodeType: 'paragraph',
      content: [
        {
          nodeType: 'text',
          value: 'Hello     world!',
          marks: [],
        },
      ],
    },
  ],
};

const options = {
  preserveWhitespace: true,
};

documentToReactComponents(document, options);
// -> <p>Hello&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;world!</p>

In this example, the multiple spaces between "Hello" and "world!" are preserved in the rendered output.