简单的JS来判断距离

distance.js

let items = [
  {
    id: "3",
    name: "XXX",
    address: "BBBB",
    lon: 114.1654,
    lat: 22.27534,
  },
  {
    id: "2",
    name: "YYYY",
    address: "AAA",
    lon: 121.4369,
    lat: 31.1883,
  },
  {
    id: "7",
    name: "菠萝酥",
    address: "虹梅路1905",
    lon: 121.4846,
    lat: 31.2316,
  },
  {
    id: "1",
    name: "ZZZZ",
    address: "CCC",
    lon: 121.3934,
    lat: 31.1592,
  },
  {
    id: "4",
    name: "UUU",
    address: "DDDD",
    lon: 121.4208,
    lat: 31.1712,
  },
  {
    id: "6",
    name: "VVVV",
    address: "EEEE",
    lon: 121.4801,
    lat: 31.236,
  },
  {
    id: "5",
    name: "WWWWW",
    address: "FFFFFF",
    lon: 121.4452,
    lat: 31.2245,
  },
];
let user = [31.24, 121.24];
function distance(lat1, lng1, lat2, lng2) {
  var radLat1 = (lat1 * Math.PI) / 180.0;
  var radLat2 = (lat2 * Math.PI) / 180.0;
  var a = radLat1 - radLat2;
  var b = (lng1 * Math.PI) / 180.0 - (lng2 * Math.PI) / 180.0;
  var s =
    2 *
    Math.asin(
      Math.sqrt(
        Math.pow(Math.sin(a / 2), 2) +
          Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)
      )
    );
  return Math.round(s * 6378.137 * 1000) / 1000;
}

items.forEach((item) => {
  item.distance = distance(user[0], user[1], item.lat, item.lon);
});

let t = items.sort((a, b) => {
  return a.distance - b.distance;
});
t.map((item) => {
  let dis =
    item.distance < 10 ? item.distance * 1000 + " 米" : item.distance + "公里";
  console.log(`name:${item.name} => 距离:${dis}`);
});