OpenLayers 4.2 - Add a source.vector from String, not url

Question

I'm using OpenLayers 4.2. Currently I add a source vector to a layer vector like this :

var vectorSource = new ol.source.Vector({
 url: 'http://example/carto.geojson',
 format: new ol.format.GeoJSON()
});
var vectorLayer = new ol.layer.Vector({
 source: vectorSource
 });

I'd like to load my source from a string.

(url = "'{"type":"FeatureCollection",
"features":[{"type":"Feature",
 "id":0,
 "geometry":{"type":"Point",
 "coordinates":[-1.68117,
 48.3717]},
 "properties":{"titre":"Nutus",
 "datedebut":"1 avril 2018",
 "datefin":"12 avril 2018",
 "lieu":"ETANG AUX MOINES"}},
{"type":"Feature",
 "id":1,
 "geometry":{"type":"Point",
 "coordinates":[-4.50069,
 48.4083]},
 "properties":{"titre":"Nutus",
 "datedebut":"1 avril 2018",
 "datefin":"12 avril 2018",
 "lieu":"BREST "}}]}"';)

Is it possible and how?

• deg: Not exactly a duplicate, but you may find some inspiration here gis.stackexchange.com/questions/244285/…

Answer 1

What about this ...

const format = new ol.format.GeoJSON();
const features = format.readFeatures(JSON.parse(`{"type":"FeatureCollection",
"features":[{"type":"Feature",
 "id":0,
 "geometry":{"type":"Point",
 "coordinates":[-1.68117,
 48.3717]},
 "properties":{"titre":"Nutus",
 "datedebut":"1 avril 2018",
 "datefin":"12 avril 2018",
 "lieu":"ETANG AUX MOINES"}},
{"type":"Feature",
 "id":1,
 "geometry":{"type":"Point",
 "coordinates":[-4.50069,
 48.4083]},
 "properties":{"titre":"Nutus",
 "datedebut":"1 avril 2018",
 "datefin":"12 avril 2018",
 "lieu":"BREST "}}]}`))
const vectorLayer = new ol.layer.Vector({
 source: new ol.source.Vector({
 features: features
 })
})
.......