React SimpleMDE (EasyMDE) Markdown Editor

React component wrapper for EasyMDE (the most fresh SimpleMDE fork).

Only two dependencies, React (peer) and EasyMDE (explicit).

New in v4

Now uses EasyMDE (the most fresh SimpleMDE fork) instead of simplemde itself. Possible breaking changes, so I bumped version to v4.
One obvious breaking change. Is how CSS is have to be imported. It used to be simplemde/dist/simplemde.min.css now it will be easymde/dist/easymde.min.css

New in v3

The initialValue prop has been removed and replaced with a value prop, allowing direct changes to the value to be made after the component mounts.
v3.6.8 if rendering server-side, you can set static ids to avoid errors in rendering synchronization.
v3.6.17 TypeScript typings added.
v3.6.19 All props will be passed to the wrapper now (except a id, onChange and few others that are ignored)
v3.6.21 React 17 support (UNSAFE methods are no longer used)

New in v2

Version 1.0 did not have SimpleMDE options configured well, this readme reflects the changes made to better include options. This is still a very new project. Testing, feedback and PRs are welcome and appreciated.

Install

npm install --save react-simplemde-editor

Demo

or view it locally:

git clone https://github.com/RIP21/react-simplemde-editor.git
cd react-simplemde-editor
yarn install
yarn demo
open browser with localhost:3000

Usage

View the demo code for a full example.

Not required, but useless without it, the onChange callback is the only option you need to set.

source-js
import React from "react";
import SimpleMDE from "react-simplemde-editor";
import "easymde/dist/easymde.min.css";

<SimpleMDE onChange={this.handleChange} />;

The data from SimpleMDE is passed to the handleChange function and you do not need to reference the event.

source-js
handleChange = value => {
  this.setState({ mdeValue: value });
};

Options

Set additional SimpleMDE options with an options prop.

Note - while SimpleMDE options has an initialValue option, this component only takes a value prop which is set as the initialValue on first render.

Note - if you don’t specify a custom id it will automatically generate an id for you.

source-js
import React from "react";
import SimpleMDE from "react-simplemde-editor";
import "easymde/dist/easymde.min.css";

<SimpleMDE
  id="your-custom-id"
  label="Your label"
  onChange={this.handleChange}
  value={this.state.textValue}
  options={{
    autofocus: true,
    spellChecker: false
    // etc.
  }}
/>;

You can include key maps using the extraKeys prop. Read more at https://codemirror.net/doc/manual.html#option_extraKeys

source-js
extraKeys = {
  Up: function(cm) {
    cm.replaceSelection(" surprise. ");
  },
  Down: function(cm) {
    cm.replaceSelection(" surprise again! ");
  }
};

<SimpleMDE
  value={this.state.textValue}
  onChange={this.handleChange}
  extraKeys={extraKeys}
/>;

Custom preview rendering example

source-js
import ReactDOMServer from "react-dom/server";

<SimpleMDE
  value={this.state.text}
  onChange={this.setText}
  options={{
    previewRender(text) {
      return ReactDOMServer.renderToString(
        <ReactMarkdown
          source={text}
          renderers={{
            CodeBlock: CodeRenderer,
            Code: CodeRenderer
          }}
        />
      );
    }
  }}
/>;

Additional listeners for events of CodeMirror

See full list of events: https://codemirror.net/doc/manual.html#events

source-js
<SimpleMDE
  value={this.state.text}
  onChange={this.handleChange}
  events={{
    'blur': (e) => {},
    'focus': (e) => {},
    //... Add any codeMirror events
  }}
/>

Autosaving example

source-js
import React, { Component } from "react";
import SimpleMDEReact from "react-simplemde-editor";

class Autosaving extends Component {
  defaultProps = {
    delay: 1000,
    value: ""
  };

  state = {
    value: localStorage.getItem(`smde_${this.props.id}`) || this.props.value
  };

  render() {
    const { options, delay, id, ...rest } = this.props;
    return (
      <SimpleMDEReact
        {...rest}
        id={id}
        value={this.state.value}
        options={{
          autosave: {
            enabled: true,
            uniqueId: id,
            delay
          },
          ...options
        }}
      />
    );
  }
}

Retrieve `simplemde` instance to be able to manipulate it.

source-js
<SimpleMDE
  getMdeInstance= { this.getInsance } // <-- set callback prop
  value={this.state.text}
  onChange={this.handleChange}
  }
/>

source-js
getIntance = instance => {
  // You can now store and manipulate the simplemde instance.
  instance.togglePreview();
};

Github : https://github.com/RIP21/react-simplemde-editor

#reactjs #javascript

React SimpleMDE (EasyMDE) Markdown Editor