Following the Non-exclusive markers example here, https://www.mapbox.com/mapbox.js/example/v1.0.0/non-exclusive-markers/, It is quite easy to filter by one property at a time.
I need to write some JS that can take a series of feature properties and show or hide each marker depending on whether any of those properties match a given checkbox's value. Can anyone point me in the direction of a method that might accomplish this?
Check out the demo, http://picturethiswebcenter.com/ods_map/
My filter code,
//filter locations by category
var filters = document.getElementById('filters');
var cats = document.getElementsByClassName('filter');
var states = document.getElementsByClassName('filter2');
function change() {
// Find all checkboxes that are checked and build a list of their values
var cats_on = [];
for (var i = 0; i < cats.length; i++) {
if (cats[i].checked) cats_on.push(cats[i].value);
}
var states_on = [];
for (var i = 0; i < states.length; i++) {
if (states[i].checked) states_on.push(states[i].value);
}
// The filter function takes a GeoJSON feature object
// and returns true to show it or false to hide it.
map.markerLayer.setFilter(function (f) {
// check each property to see if its value is in the list
// of categories that should be on, stored in the 'on' array
return cats_on.indexOf(f.properties['category']) !== -1;
return states_on.indexOf(f.properties['state']) !== -1;
});
return false;
}
// When the form is touched, re-filter markers
filters.onchange = change;
// Initially filter the markers
change;