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Use feature state to change features to same color on hover
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset='utf-8' /> | |
| <title>Create a hover effect</title> | |
| <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /> | |
| <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.47.0/mapbox-gl.js'></script> | |
| <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.47.0/mapbox-gl.css' rel='stylesheet' /> | |
| <style> | |
| body { margin:0; padding:0; } | |
| #map { position:absolute; top:0; bottom:0; width:100%; } | |
| </style> | |
| </head> | |
| <body> | |
| <div id='map'></div> | |
| <script> | |
| mapboxgl.accessToken = 'pk.eyJ1IjoibWFsLXdvb2QiLCJhIjoiY2oyZ2t2em50MDAyMzJ3cnltMDFhb2NzdiJ9.X-D4Wvo5E5QxeP7K_I3O8w'; | |
| var map = new mapboxgl.Map({ | |
| container: 'map', | |
| style: 'mapbox://styles/mapbox/streets-v9', | |
| center: [-100.486052, 37.830348], | |
| zoom: 2 | |
| }); | |
| var hoveredStateId = null; | |
| map.on('load', function () { | |
| map.addSource("shapes", { | |
| "type": "geojson", | |
| "data": "./shape-data.geojson" | |
| }); | |
| // The feature-state dependent fill-opacity expression will render the hover effect | |
| // when a feature's hover state is set to true. | |
| map.addLayer({ | |
| "id": "shape-fills", | |
| "type": "fill", | |
| "source": "shapes", | |
| "layout": {}, | |
| "paint": { | |
| "fill-color": ['case', | |
| ["boolean", ["feature-state", "hover"], false], | |
| "#fff", | |
| ['match',['get', 'test'], | |
| 'foo', '#90e2bc', | |
| 'bar', '#faff67', | |
| 'baz', '#a0aabf', | |
| '#a0aabf']], | |
| "fill-opacity": 1, | |
| } | |
| }); | |
| map.on("mousemove", "shape-fills", function(e) { | |
| if (e.features.length > 0) { | |
| if (hoveredStateId) { | |
| map.setFeatureState({source: 'shapes', id: hoveredStateId}, { hover: false}); | |
| } | |
| console.log(e.features[0].id) | |
| hoveredStateId = e.features[0].id; | |
| map.setFeatureState({source: 'shapes', id: hoveredStateId}, { hover: true}); | |
| } | |
| }); | |
| map.on("mouseleave", "shape-fills", function() { | |
| if (hoveredStateId) { | |
| map.setFeatureState({source: 'shapes', id: hoveredStateId}, { hover: false}); | |
| } | |
| hoveredStateId = null; | |
| }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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