cesium turf.js shows the intersection area of two polygons

1. Install the turf graphics auxiliary plug-in and the turf intersection plug-in

npm install @turf/helpers  //所有的基础图形
npm install @turf/intersect

//用法
import { polygon } from '@turf/helpers' // 引入需要的图形
import turf_intersect from '@turf/intersect' 
//turf_intersect 即为相交函数本省，不需要再加intersect

or

npm install turf-polygon  //只下载多边形
npm install @turf/intersect

//用法
import turf-polygon from 'turf-polygon' // 引入需要的图形
import turf_intersect from '@turf/intersect' 
//turf_intersect 即为相交函数本省，不需要再加intersect

2. Draw intersecting graphics

let poly1 = polygon([polygonDrawArr[0]])
let poly2 = polygon([polygonDrawArr[1]])
let geojson = turf_intersect(poly1, poly2)

or

let poly1 = turf-polygon([polygonDrawArr[0]])
let poly2 = turf-polygon([polygonDrawArr[1]])
let geojson = turf_intersect(poly1, poly2)

The parameter format of polygon is as follows

[[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]]