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    0.7.0 • Public • Published

    Mobiledoc DOM Renderer Build Status

    This is a DOM renderer for the Mobiledoc format used by Mobiledoc-Kit.

    To learn more about Mobiledoc cards and renderers, see the Mobiledoc Cards docs.

    The renderer is a small library intended for use in browser clients.


    var mobiledoc = {
      version: "0.3.0",
      markups: ["B"],
      atoms: [],
      cards: [],
      sections: [
        [1, 'P', [ // array of markers
          // marker
          [ 0,            // marker type 0 (standard text)
            [0],          // open markups (by index)
            0,            // close count
            'hello world'
    var renderer = new MobiledocDOMRenderer({cards: []});
    var rendered = renderer.render(mobiledoc);
    var result = rendered.result;
    // renders <div><p><b>hello world</b></b></div>
    // into 'output' element

    The Renderer constructor accepts a single object with the following optional properties:

    • cards [array] - The list of card objects that the renderer may encounter in the mobiledoc
    • atoms [array] - The list of atom objects that the renderer may encounter in the mobiledoc
    • cardOptions [object] - Options to pass to cards and atoms when they are rendered
    • unknownCardHandler [function] - Will be called when any unknown card is enountered
    • unknownAtomHandler [function] - Will be called when any unknown atom is enountered
    • sectionElementRenderer [object] - A map of hooks for section element rendering.
      • Valid keys are P, H1, H2, H3, H4, H5, H6, BLOCKQUOTE, ASIDE
      • Arguments are tagName, dom
      • A valid value is a function that returns an element
    • markupElementRenderer [object] - A map of hooks for inline element rendering.
      • Valid keys are B, I, STRONG, EM, A, U, SUB, SUP, S, CODE
      • Arguments are tagName, dom, attributes={}
      • A valid value is a function that returns an element
    • dom [object] - A native or SimpleDOM implementation of the DOM.

    The return value from renderer.render(mobiledoc) is an object with two properties:

    • result [DOM Node] - The rendered result
    • teardown [function] - When called, this function will tear down the rendered mobiledoc and call any teardown handlers that were registered by cards when they were rendered

    Rendering HTML

    In a browser, rendering to HTML is simple:

    var renderer = new MobiledocDOMRenderer();
    var rendered = renderer.render(mobiledoc);
    var html = rendered.result.outerHTML;

    However on the server in Node.js, native DOM APIs are not available. To make server-rendering easy, this DOM renderer is SimpleDOM compatible. You may pass an instance of a SimpleDOM document and serialize its output. For example:

    var renderer = new MobiledocDOMRenderer({
      dom: new SimpleDOM.Document()
    var rendered = renderer.render(mobiledoc);
    var serializer = new SimpleDOM.HTMLSerializer([]);
    var html = serializer.serializeChildren(rendered.result);

    This usage of the DOM renderer for rendering HTML has the advantage of allowing developers to easily implement cards that work in a server and client context.


    Use this renderer option to customize what element is used when rendering a section.

    var renderer = new MobiledocDOMRenderer({
      sectionElementRenderer: {
        P: function(_, dom) { return dom.createElement('span'); },
        H1: function(_, dom) { return dom.createElement('h2'); },
        H2: function(tagName, dom) {
          var element = dom.createElement(tagName);
          element.setAttribute('class', 'subheadline');
          return element;
        /* Valid keys are P, H1, H2, H3, H4, H5, H6, BLOCKQUOTE, ASIDE */
    var rendered = renderer.render(mobiledoc);


    Use this renderer option to customize what inline tags are used when rendering a section's content.

    var renderer = new MobiledocDOMRenderer({
      markupElementRenderer: {
        B: function(_, dom) { return dom.createElement('strong'); },
        A: function(tagName, dom, attrs={}) {
          let element = dom.createElement(tagName);
          for (let attr in attrs) {
            element.setAttribute(attr, attrs[attr]);
          element.setAttribute('rel', 'nofollow');
          return element;
    var rendered = renderer.render(mobiledoc);

    Attribute Sanitization (XSS Protection)

    Mobiledoc DOM Renderer sanitizes the href attribute of 'A' markups, prefixing the string unsafe: on potentially unsafe urls. It determines an environment- appropriate URL protocol parser. In rare cases it may be unable to determine one (this can happen when running the renderer in a Node VM Sandbox, like ember-cli- fastboot does), and will throw in that case. To fix this, you can provide a custom markupElementRenderer for the 'A' tag that will be used instead of the default.



    • Use np (install with npm install -g np)
    • np <version> (e.g. np 0.5.2)
    • git push --tags


    npm i mobiledoc-dom-renderer

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