使用react-leaflet在标记内实现动态JSX元素

我有一个正在使用的 React 应用程序Leaflet http://leafletjs.com/通过反应传单 https://github.com/PaulLeCam/react-leaflet，两个超级有用的库。

在这个应用程序中，我有一组需要渲染的坐标，如下所示：

1. When zoomed out, cluster the coordinates into Marker Clusters like so

2. 放大时，每个标记需要有

   1. 其下方有一个动态倒计时器
   2. A dynamic SVG countdown clock around it like so

对于聚类，我使用的是反应传单标记簇 https://www.npmjs.com/package/react-leaflet-markercluster插件，非常适合显示静态内容。

但是，当我需要在每个标记中显示任何动态内容时，我无法选择发送JSX，仅提供静态 HTML，如可用示例所示here https://yuzhva.github.io/react-leaflet-markercluster/#marker-popup.

// Template for getting popup html MarkerClusterGroup
// IMPORTANT: that function returns string, not JSX
function getStringPopup(name) {
  return (`
    <div>
      <b>Hello world!</b>
      <p>I am a ${name} popup.</p>
    </div>
  `);
}

// that function returns Leaflet.Popup
function getLeafletPopup(name) {
  return L.popup({ minWidth: 200, closeButton: false })
    .setContent(`
      <div>
        <b>Hello world!</b>
        <p>I am a ${name} popup.</p>
      </div>
    `);
}

有办法处理这种情况吗？如何制作 JSX 标记而不是静态 HTML 标记？

PS：我尝试过使用ReactDOM.renderToString已经，但这是一个丑陋的黑客，并且每次都需要重新渲染标记。

TIA!!

这是一个示例WebpackBin https://www.webpackbin.com/bins/-KxhoIKcuQaFNyL7zivs如果您心中有解决方案，可以尝试一下

我现在找到了一些将自定义 JSX 渲染为标记的工作代码。

这是95%的副本https://jahed.dev/2018/03/20/react-portals-and-leaflet/ https://jahed.dev/2018/03/20/react-portals-and-leaflet/以及 5% 的灵感来自https://github.com/PaulLeCam/react-leaflet/blob/master/packages/react-leaflet/src/Marker.tsx https://github.com/PaulLeCam/react-leaflet/blob/master/packages/react-leaflet/src/Marker.tsx

我确信有些事情可以进一步优化。

import * as React from 'react';
import { createPortal } from "react-dom";
import { DivIcon, marker } from "leaflet";
import * as RL from "react-leaflet";
import { MapLayer } from "react-leaflet";
import { difference } from "lodash";

const CustomMarker = (RL as any).withLeaflet(class extends MapLayer<any> {
    leafletElement: any;
    contextValue: any;

    createLeafletElement(props: any) {
        const { map, layerContainer, position, ...rest } = props;

// when not providing className, the element's background is a white square
// when not providing iconSize, the element will be 12x12 pixels
        const icon = new DivIcon({ ...rest, className: '', iconSize: undefined });

        const el = marker(position, { icon: icon, ...rest });
        this.contextValue = { ...props.leaflet, popupContainer: el };
        return el;
    }

    updateLeafletElement(fromProps: any, toProps: any) {
        const { position: fromPosition, zIndexOffset: fromZIndexOffset, opacity: fromOpacity, draggable: fromDraggable, className: fromClassName } = fromProps;
        const { position: toPosition, zIndexOffset: toZIndexOffset, toOpacity, draggable: toDraggable, className: toClassName } = toProps;

        if(toPosition !== fromPosition) {
            this.leafletElement.setLatLng(toPosition);
        }
        if(toZIndexOffset !== fromZIndexOffset) {
            this.leafletElement.setZIndexOffset(toZIndexOffset);
        }
        if(toOpacity !== fromOpacity) {
            this.leafletElement.setOpacity(toOpacity);
        }
        if(toDraggable !== fromDraggable) {
            if(toDraggable) {
                this.leafletElement.dragging.enable();
            } else {
                this.leafletElement.dragging.disable();
            }
        }
        if(toClassName !== fromClassName) {
            const fromClasses = fromClassName.split(" ");
            const toClasses = toClassName.split(" ");
            this.leafletElement._icon.classList.remove(
                ...difference(fromClasses, toClasses)
            );
            this.leafletElement._icon.classList.add(
                ...difference(toClasses, fromClasses)
            );
        }
    }

    componentWillMount() {
        if(super.componentWillMount) {
            super.componentWillMount();
        }
        this.leafletElement = this.createLeafletElement(this.props);
        this.leafletElement.on("add", () => this.forceUpdate());
    }

    componentDidUpdate(fromProps: any) {
        this.updateLeafletElement(fromProps, this.props);
    }

    render() {
        const { children } = this.props;
        const container = this.leafletElement._icon;

        if(!container) {
            return null;
        }

        const portal = createPortal(children, container);

        const LeafletProvider = (RL as any).LeafletProvider;

        return children == null || portal == null || this.contextValue == null ? null : (
            <LeafletProvider value={this.contextValue}>{portal}</LeafletProvider>
        )
    }
});

然后在你的组件中使用它，如下所示：

<Map ...>
  <CustomMarker position={[50, 10]}>
    <Tooltip>
      tooltip
    </Tooltip>
    <Popup>
      popup
    </Popup>
    
    <div style={{ backgroundColor: 'red' }} onClick={() => console.log("CLICK")}>
      CUSTOM MARKER CONTENT
    </div>
    MORE CONTENT
  </CustomMarker>
</Map>

如果你不使用 TypeScript。只需删除as any and : any stuff.

编辑：某些东西会自动设置width: 12px; and height: 12px;。我还不确定如何防止这种情况。其他一切似乎都工作正常！

编辑2：修复它！使用iconSize: undefined

EDIT3：还有这个：https://github.com/OpenGov/react-leaflet-marker-layer https://github.com/OpenGov/react-leaflet-marker-layer还没有测试过，但示例代码看起来不错。