mdast-to-slate.js

export default function plugin(settings = {}) {
  this.Compiler = compiler;

  function compiler(node) {
    return node.children.map(markdownToSlate);
  }
}

function markdownToSlate(node) {
  let children = [];

  if (Array.isArray(node.children)) {
    children = node.children.map(c => markdownToSlate({ ...c, ordered: node.ordered || false }));
  }

  switch (node.type) {
    case 'heading':
      return { type: depthToHeading[node.depth], children };
    case 'list':
      return {
        type: node.ordered ? 'numbered-list' : 'bulleted-list',
        children,
      };
    case 'listItem':
      return { type: 'list-item', children };
    case 'emphasis':
      return { ...forceLeafNode(children), italic: true };
    case 'strong':
      return { ...forceLeafNode(children), bold: true };
    case 'delete':
      return { ...forceLeafNode(children), strikeThrough: true };
    case 'paragraph':
      return { type: node.type, children };
    case 'link':
      return { type: node.type, link: node.url, children };
    case 'text':
    default:
      return { text: node.value };
  }
}

const depthToHeading = {
  1: 'heading-one',
  2: 'heading-two',
  3: 'heading-three',
  4: 'heading-four',
  5: 'heading-five',
  6: 'heading-six',
};

const forceLeafNode = children => {
  return { text: children[0].text };
};