A React markdown editor and previewer.

• Demo for Markdown authors
• Demo for React developers
  • source code

yarn add react-markplus

import MarkPlus from "react-markplus";

<MarkPlus markdown="# Hello world!" />;

You will need to import the following CSS:

• "katex/dist/katex.css";
• "@fortawesome/fontawesome-free/css/all.css";
• "react-markplus/src/css/index.scss";

Initial markdown text to load into the editor.

<MarkPlus markdown="# Hello world!" />;

Default value is ''.

A callback function to be invoked automatically when markdown text changes.

<MarkPlus
  onChange={(markdown) => {
    console.log("markdown text changed to:", markdown);
  }}
/>;

Default value is () => {}.

A callback function to be invoked automatidally when preview html changes.

This has been removed from the library. Because you are supposed to generate preview using markplus-engine.

Show, hide or remove toolbar.

<MarkPlus toolbar="show" />;

3 possible values:

• show: show toolbar, show a gutter below toolbar. Click the gutter to hide toolbar.
• hide: hide toolbar, show a gutter on top. Click the gutter to show toolbar.
• none: no toolbar, no gutter.

Default value: show.

Display editor, preview or both.

<MarkPlus mode="both" />;

3 possible values:

• both: show both editor and preview
  • there is a vertical gutter between editor and preview, you may drag the gutter to adjust sizes of them.
• editor: show editor only
• preview: show preview only
  • Use this mode if you don't need any editing feature.
  • in this mode this library is a markdown renderer.

Default value: both.

Overall theme: light, dark or auto:

<MarkPlus theme="auto" />;

3 possible values:

• light: light theme
• dark: dark theme
• auto: same as system theme

Default value: auto.

You may configure the toolbar freely.

<MarkPlus toolbarItems={["about", "|", "bold", "italic"]} />;

A toolbar item could be either a string or a ReactElement. For toolbar items included with library, you may just specify a string. For your own custom toolbar items, please specify a ReactElement.

• 'about'
  • show a modal about MarkPlus
• '|'
  • a vertical separator
• 'bold'
  • make text bold
• 'italic'
  • make text italic
• 'strikethrough'
  • make text strokethrough
• 'underline'
  • make text underlined
• 'mark'
  • make text marked
• 'emoji'
  • show a modal to insert emojis
• 'fontawesome'
  • show a modal to insert fontawesome icons
• 'quote'
  • quote text
• 'unordered-list'
  • create unordered list item
• 'ordered-list'
  • create ordered list item
• 'unchecked-list'
  • create unchecked task list item
• 'checked-list'
  • create checked task list item
• 'link'
  • insert a link
• 'image'
  • insert a image
• 'code'
  • insert a code snippet
• 'table'
  • insert a table
• 'math'
  • insert some math formulas
• flowchart
  • insert some flowcharts

import { defaultToolbarItems } from "react-markplus";

Its value is:

[
  "about",
  "|",
  "bold",
  "italic",
  "strikethrough",
  "underline",
  "mark",
  "|",
  "emoji",
  "fontawesome",
  "|",
  "quote",
  "unordered-list",
  "ordered-list",
  "unchecked-list",
  "checked-list",
  "|",
  "link",
  "image",
  "code",
  "table",
  "|",
  "math",
  "flowchart",
];

You may add or remote items from it to customize your own toolbar.

Here is a sample to create and insert a custom toolbar item:

<MarkPlus
  toolbarItems={[
    "about",
    "|",
    <i
      key="preferences"
      title="Preferences"
      className="fa fa-cog"
      onClick={() => {
        console.log("Todo: display a preferences modal");
      }}
    >
    </i>,
  ]}
/>;

Custom toolbar item will freeze in React 19 dev mode.

It works in production mode though. It also works with React 18.