我正在开发一个带有标记的 Mapbox GL JS 地图的 React (16( SPA,我正在尝试在每个标记弹出窗口中渲染一个Link
,它会抛出以下内容:Error: Invariant failed: You should not use <Link> outside a <Router>
这让我感到困惑,因为Map
组件是App
组件的子组件,该组件被包装在react-router-dom
的BrowserRouter
中。
Map
组件:
import React, { Component } from 'react';
import { initalizeMap, getCenter, getZoom, addGeolocateButton, addMarkers, getMarkers } from '../helpers/mapbox';
export default class EventsMap extends Component {
state = { lng: 2.1700556, lat: 41.3869959, zoom: 11 };
onMapMove = () => this.setState({
lng: getCenter('lng', this.map),
lat: getCenter('lat', this.map),
zoom: getZoom(this.map),
});
renderMap = () => {
const { lng, lat, zoom } = this.state;
this.map = initalizeMap(lng, lat, zoom, this.mapContainer);
this.map.on('move', () => this.onMapMove());
addGeolocateButton(this.map);
const markers = getMarkers(this.props.events);
addMarkers(markers, this.map);
}
componentDidMount = () => this.renderMap();
render() {
return (
<div className='events-map'>
<div ref={(el) => this.mapContainer = el} className='mapContainer' />
</div>
);
}
}
mapbox.js
帮助程序导入和addMarkers
声明:
import React from 'react';
import ReactDOM from 'react-dom';
import { Link } from 'react-router-dom';
import mapboxgl from 'mapbox-gl';
export const addMarkers = (markers, map) => {
markers.features.forEach((marker) => {
const el = document.createElement('div');
el.className = 'marker';
const { _id, name, place } = marker.properties;
const markerDiv = document.createElement('div');
const markerContents = <div><Link to={`/events/${_id}`}><h3>{name}</h3></Link><p>{place}</p></div>;
ReactDOM.render(markerContents, markerDiv);
new mapboxgl.Marker(el)
.setLngLat(marker.geometry.coordinates)
.setPopup(new mapboxgl.Popup({ offset: 25 })
.setDOMContent(markerDiv))
.addTo(map);
})
};
使用外部 URL 的锚点没有问题,例如:const markerContents = <div><a href={
https://google.com}><h3>{name}</h3></a><p>{place}</p></div>;
但是我需要对内部链接使用Link
以避免重定向、重新加载等。为什么Link
不了解Router
背景?
我无法从react-router-dom
获得<Link>
工作,而是简单地用withRouter
HoC包装父Map
组件的导出,this.props.history
传递到addMarkers
,将事件侦听器附加到弹出内容并推送到历史对象onClick以重定向:
export const addMarkers = (markers, map, history) => {
markers.features.forEach((marker) => {
const onClick = (e) => {
const { _id } = marker.properties;
history.push(`/events/${_id}`);
}
const el = document.createElement('div');
el.className = 'marker';
const { name, place, rank } = marker.properties;
el.style.backgroundImage = `url(/markers/${rank + 1}.svg)`;
const popupContainer = document.createElement('div');
const popupContents = <div><button onClick={onClick}><h3>{name}</h3></button><p>{place}</p></div>;
与我上面写的代码相比,代码有点进化,但重点是当带有 history 对象的简单事件侦听器可以使用Link
时。