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    0.2.0 • Public • Published

    React WebMap Framework


    This framework combine two libraries as Leaflet.js and React. It think how web mapping library like Leaflet.js coexist with concepts of React.

    It does not use Shadow DOM for rendering a map and configuring layers because do all these for mapping. But it is low reusability to define states of a map and configure layers in Leaflet.js.. Therefore, it uses ArcGIS Web Map to put full information for mapping data out. It is able to initialize a structure just with web map id.

    See the live demo.


    Install react-webmap via npm.

    npm i react-webmap

    Import Mediator component from the library.

    import { Mediator } from 'react-webmap';

    Add the component to your render function:

    const mapid = '55e02e777274468c90745fde6641faf4'; // You can get mapid from ArcGIS!
    ReactDOM.render(<Mediator mapid={mapid} />, container);

    You can get a mapid from See Make your first map.

    Development Instructions

    You can create new Reactor or improve the framework for Mediator or Reactors as the below.

    1. Fork and clone react-webmap
    2. cd into the react-webmap folder
    3. Install the dependencies with npm install
    4. Run npm run build from the command line. This will compile JSX in a brand new dist directory.
    5. Run npm run start to compile an example codes to minified source in a docs directory and launch a tiny webserver.
    6. Run npm test to make sure you haven't introduced a new 'feature' accidentally. ( IN PREPARATION)
    7. Make your changes in its own topic branch and create a pull request!

    Recipe for Reactor

    1. Make a directory (e.g. HomeButton) for new Reactor into src/example/reactors.
    2. Make and open a js file (e.g. HomeButton.js) in your text editor.
    3. Create new class (named the same of the file) extend React.Component with ES2015.
    4. Define props (e.g. center, zoom) for getting data from a map via Mediator.
    5. Make a function for render data or action to a map.
    6. Make a event (e.g. <Button onClick={this._onGetHome}> runs this.props.onGetHome) on Reactor to move a map or highlight data (OPTION)
    7. Add new Reactor into Mediator.js with import.
    8. Add new property into Mediator.props to initialize your Reactor (OPTION).
    9. Add JSX markup of new Reactor (e.g. <HomeButton />) into render() of Mediator.
    10. Set props into JSX (e.g. <HomeButton center={this.state.initialCenter} zoom={this.state.initialZoom} />) with this.state.
    11. Add a funtion for using Leaflet methods and bind it with this (e.g. this.fitBounds = this.fitBounds.bind(this);) in the load event listner for L.esri.webMap (OPTION).


    import React from 'react';
    import { Button, Glyphicon } from 'react-bootstrap';
    class HomeButton extends React.Component {
      constructor (props) {
          this._onGetHome = this._onGetHome.bind(this);
      _onGetHome () {
        this.props.onGetHome(, this.props.zoom);
      render () {
        return (
            <Button onClick={this._onGetHome}>
              <Glyphicon glyph="home" />
    HomeButton.propTypes = {
      center: React.PropTypes.array,
      zoom: React.PropTypes.number,
      onGetHome: React.PropTypes.func
    HomeButton.defaultProps = {
      center: [35, 139],
      zoom : 5,
      onGetHome: function () {}
    HomeButton.displayName = 'HomeButton';
    export default HomeButton;


    npm i react-webmap

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    • ynunokawa