小编PKA*_*PKA的帖子

var mymap = L.map('map').setView([51.505, -0.09], 13);

var tileLayer = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
  attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors',
  opacity: 0
}).addTo(mymap);

var slider = document.getElementById('opacity-slider');
slider.addEventListener('input', function(e) {
  var value = Number(e.target.value);
  var opacity = value / 100;
  tileLayer.setOpacity(opacity);
});