Porta11y is a collection of accessibility-focused annotations, decorators and validators for Sanity’s Portable Text editor.

Portable Text is a JSON based rich text specification for modern content editing platforms. It is designed to be a format for text editing interfaces and for serializing into any human-readable format.

It provides an incredible opportunity to create editing experiences with accessibility in mind. This repository is a collection of Portable Text utilities to enrich the base editor with additional accessibility-related tools. Namely:

• Lang annotation: an annotation to demark text snippets as being expressed in another language than the main content.
• Del decorator: a decorator to demark text snippets as being deleted.
• Ins decorator: a decorator to demark text snippets as being inserted.
• Sub decorator: a decorator to demark text snippets as being subscript.
• Sup decorator: a decorator to demark text snippets as being superscript.
• Fake lists validator: a custom validation function to make sure lists are done via the appropriate list feature and not with text markers, resulting in more semantic HTML.

The lang utility provides an annotation to demark an inline text snippet as being expressed in another language than the main content. This is important for screen-readers (WCAG 2.1 SC 3.1.2 and ATAG B.2.1.1). Refer to this article for more information.

import { lang } from 'porta11y'

export default {
  title: 'Content',
  name: 'content',
  type: 'array',
  of: [
    {
      type: 'block',
      marks: {
        annotations: [
          lang({
            title: 'Autre langue',
            fieldTitle: 'Code de langue',
            /* Other options … */
          }),
        ],
      },
    },
  ],
}

The sub utility is a decorator to mark a text snippet as being subscript.

import { sub } from 'porta11y'

export default {
  title: 'Content',
  name: 'content',
  type: 'array',
  of: [
    {
      type: 'block',
      marks: {
        decorators: [{ title: 'Strong', value: 'strong' }, sub()],
      },
    },
  ],
}

The sup utility is a decorator to mark a text snippet as being superscript.

import { sup } from 'porta11y'

export default {
  title: 'Content',
  name: 'content',
  type: 'array',
  of: [
    {
      type: 'block',
      marks: {
        decorators: [{ title: 'Strong', value: 'strong' }, sup()],
      },
    },
  ],
}

The del utility is a decorator to mark a text snippet as being a text deletion.

import { del } from 'porta11y'

export default {
  title: 'Content',
  name: 'content',
  type: 'array',
  of: [
    {
      type: 'block',
      marks: {
        decorators: [{ title: 'Strong', value: 'strong' }, del()],
      },
    },
  ],
}

The ins utility is a decorator to mark a text snippet as being a text insertion.

import { ins } from 'porta11y'

export default {
  title: 'Content',
  name: 'content',
  type: 'array',
  of: [
    {
      type: 'block',
      marks: {
        decorators: [{ title: 'Strong', value: 'strong' }, ins()],
      },
    },
  ],
}

Sometimes lists on web pages are not marked up as lists, with ul, ol or dl elements, but separate list items with merely returns instead. This validation rule finds those cases.

import { noFakeLists } from 'porta11y'

export default {
  title: 'Content',
  name: 'content',
  type: 'array',
  of: [
    {
      type: 'block',
    },
  ],
  validation: Rule => Rule.custom(noFakeLists()),
}