How to use unist-builder - 10 common examples

const convertedNodes = [];
    let remainingNodes = nodes;

    while (remainingNodes.length > 0) {
      const nextNode = remainingNodes[0];
      if (nextNode.object === 'inline' || (nextNode.marks && nextNode.marks.length > 0)) {
        const [markType, markNodes, remainder] = extractFirstMark(remainingNodes);
        /**
         * A node with a code mark will be a text node, and will not be adjacent
         * to a sibling code node as the Slate schema requires them to be
         * merged. Markdown also requires at least a space between inline code
         * nodes.
         */
        if (markType === 'code') {
          const node = markNodes[0];
          convertedNodes.push(u(markMap[markType], node.data, node.text));
        } else if (!markType && markNodes.length === 1 && markNodes[0].object === 'inline') {
          const node = markNodes[0];
          convertedNodes.push(convertInlineNode(node, convertInlineAndTextChildren(node.nodes)));
        } else {
          const {
            leadingWhitespace,
            trailingWhitespace,
            centerNodes,
          } = normalizeFlankingWhitespace(markNodes);
          const children = convertInlineAndTextChildren(centerNodes);
          const markNode = u(markMap[markType], children);

          // Filter out empty marks, otherwise their output literally by
          // remark-stringify, eg. an empty bold node becomes "****"
          if (mdastToString(markNode) === '') {
            remainingNodes = remainder;

it('should preserve validly nested siblings of invalidly nested blocks', () => {
    const input = u('root', [
      u('paragraph', [
        u('blockquote', [
          u('strong', [
            u('text', 'Deep validly nested text a.'),
            u('heading', { depth: 1 }, [u('text', 'Heading text.')]),
            u('text', 'Deep validly nested text b.'),
          ]),
        ]),
        u('text', 'Validly nested text.'),
      ]),
    ]);

    const output = u('root', [
      u('blockquote', [
        u('strong', [u('text', 'Deep validly nested text a.')]),
        u('heading', { depth: 1 }, [u('text', 'Heading text.')]),
        u('strong', [u('text', 'Deep validly nested text b.')]),
      ]),
      u('paragraph', [u('text', 'Validly nested text.')]),
    ]);

it("must parse more complex math equations in math block", () => {
    const processor = remark().use(math);

    const targetText =
      "$$p(\\theta_i \\thinspace | \\, \\{\\theta_{j \\neq i}\\}, D)$$";

    const ast = processor.parse(targetText);

    expect(ast).toEqual(
      u("root", [
        u("paragraph", [
          u(
            "math",
            {
              data: {
                hChildren: [
                  u(
                    "text",
                    "p(\\theta_i \\thinspace | \\, \\{\\theta_{j \\neq i}\\}, D)"
                  )
                ],
                hName: "div",
                hProperties: {
                  className: "math"
                }
              }

it("must render super factorial to a math inline", () => {
    const processor = remark().use(math);

    const targetText = ["$$", "\\alpha\\$", "$$"].join("\n");

    const ast = processor.parse(targetText);

    expect(ast).toMatchObject(u("root", [u("math", "\\alpha\\$")]));
  });

it('should unnest deeply nested blocks', () => {
    const input = u('root', [
      u('paragraph', [
        u('paragraph', [
          u('paragraph', [
            u('paragraph', [u('text', 'Paragraph text.')]),
            u('heading', { depth: 1 }, [u('text', 'Heading text.')]),
            u('code', 'someCode()'),
            u('blockquote', [
              u('paragraph', [u('strong', [u('heading', [u('text', 'Quote text.')])])]),
            ]),
            u('list', [u('listItem', [u('text', 'A list item.')])]),
            u('table', [u('tableRow', [u('tableCell', [u('text', 'Text in a table cell.')])])]),
            u('thematicBreak'),
          ]),
        ]),
      ]),
    ]);

    const output = u('root', [
      u('paragraph', [u('text', 'Paragraph text.')]),
      u('heading', { depth: 1 }, [u('text', 'Heading text.')]),
      u('code', 'someCode()'),
      u('blockquote', [u('heading', [u('text', 'Quote text.')])]),
      u('list', [u('listItem', [u('text', 'A list item.')])]),
      u('table', [u('tableRow', [u('tableCell', [u('text', 'Text in a table cell.')])])]),
      u('thematicBreak'),
    ]);

* Slate schemas don't usually infer basic type info from data, so each
       * level of heading is a separately named type. The MDAST schema just
       * has a single "heading" type with the depth stored in a "depth"
       * property on the node. Here we derive the depth from the Slate node
       * type - e.g., for "heading-two", we need a depth value of "2".
       */
      case 'heading-one':
      case 'heading-two':
      case 'heading-three':
      case 'heading-four':
      case 'heading-five':
      case 'heading-six': {
        const depthMap = { one: 1, two: 2, three: 3, four: 4, five: 5, six: 6 };
        const depthText = node.type.split('-')[1];
        const depth = depthMap[depthText];
        const mdastNode = u(typeMap[node.type], { depth }, children);
        if (mdastToString(mdastNode)) {
          return mdastNode;
        }
        return;
      }

      /**
       * Code Blocks
       *
       * Code block nodes may have a single text child, or instead be void and
       * store their value in `data.code`. They also may have a code language
       * stored in the "lang" data property. Here we transfer both the node value
       * and the "lang" data property to the new MDAST node, and spread any
       * remaining data as `data`.
       */
      case 'code-block': {

function renderHTML(node) {
  if (!node) {
    return '';
  }

  if (Array.isArray(node)) {
    node = u('root', node);
  }

  return remark()
    .use(remarkHtml)
    .stringify(node);
}

function renderSeeLink(comment) {
  return (
    comment.sees.length > 0 &&
    u(
      'list',
      { ordered: false },
      comment.sees.map(see =>
        u('listItem', [
          u('strong', [u('text', 'See Also ')].concat(see.children)),
        ]),
      ),
    )
  );
}

function renderParams(comment) {
  return (
    comment.params.length > 0 &&
    u('html', renderParamsHTML(comment.params, { title: 'ARGUMENTS' }))
  );
}

function renderHeading(comment, depth) {
  return (
    !!comment.name && [
      u('heading', { depth }, [
        u(
          'text',
          comment.kind === 'function' ? `${comment.name}()` : comment.name,
        ),
      ]),
    ]
  );
}