leaflet.geojsonfilter
v0.1.1
Published
This extension of leaflet is inspired by mapbox setfilter function.
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#L.geojsonFilter
This extension of leaflet is inspired by mapbox featureLayer.setFilter function.
When you use setFilter
function in L.geoJson
, the origin geoJson will not be stored. After changing the filter, markers will becomes less. Therefore I wants to save the geoJson alternatively.
Installation
From npm repo
npm install leafletgeojsonfilter --save
From CDN
https://cdn.rawgit.com/brandonxiang/leaflet.geoJsonFilter/develop/src/L.geoJsonFilter.js
Version
0.0.1 L.geoJsonFilter is a extension of L.GeoJSON, so you should call L.geoJsonFilter
0.1.0 setFilter is included in L.GeoJSON, so you can call 'L.geoJson'
Usage
marker.setFilter(function(f){
return f.properties.number === 2;
});
DEMO
LICENSE
##进阶插件编写geojsonFilter
github源码在此,记得点星: https://github.com/brandonxiang/leaflet.geoJsonFilter
灵感来源自mapbox的featureLayer.setFilter功能。
当然L.geoJson也有setfilter的功能,但是它原始的geojson并不会进行存储,在改变filter后,markers会越来越少。这是由于它并没有存储原型数据,我参考了mapbox.js的featurelayer源码。将输入数据以私有变量的形式存储起来,替换filter时再进行加载。这样,就可以不用mapbox.js的情况下使用setfilter。
###原理
原理很简单,先将geojson存起来。当setfilter完成后重新加载。
###使用方法
marker.setFilter(function(f){
return f.properties.number === 2;
});
###例子
转载,请表明出处。总目录Awesome GIS