google地图api和javascript的新特性-切换json数据/层

Question

尝试处理一些调查数据(现在使用相同的json文件)有没有关于如何关闭变量边界的想法？我已经尝试了可见和覆盖样式，但似乎无法破解它。

// Call the variables for a new map

Boundaries = new google.maps.Data();
Road = new google.maps.Data();

// Set variable to load json files/data

Boundaries.loadGeoJson('StageBoundariesLayer.json');
Road.loadGeoJson('StageBoundariesLayer.json');

// Set style of the variables/layers


Boundaries.setStyle({
  visible: true,
  strokeColor: 'yellow',
  strokeWeight: 5 
});

Road.setStyle({
  visibility: true,
  strokeColor: 'red',
  strokeWeight: 1
  
});

Boundaries.setMap(map);
Road.setMap(map);

document.getElementById('button1').addEventListener('click', toggleBoundaries);

function toggleBoundaries(){
  if (Boundaries.overrideStyle.visible === true){
    Boundaries.setStyle.visible = false;
  } else {
    Boundaries.setStyle.visible = true;
  }
};
toggleBoundaries();

Answer 1

document.getElementById('button1').addEventListener('click', toggleBoundaries);

function toggleBoundaries() {
  if (Boundaries.getMap() != null) {
      Boundaries.setMap(null);
  } else {
      Boundaries.setMap(map);
  }
}
toggleBoundaries();