Use search rather than accession service.

.travis.yml

@@ -1,3 +1,6 @@
 language: node_js
 node_js:
-  - 0.10
+  - "5"
+  - "6"
+  - "7"
+  - "8"

src/Constants.js

@@ -12,22 +12,22 @@ var visualizationTypes = {
 var uniprotSource = 'uniprot';
 var uniprotSources = [
     {
-        url: 'https://www.ebi.ac.uk/proteins/api/features/',
+        url: 'https://www.ebi.ac.uk/proteins/api/features?accession=',
         source: uniprotSource,
         category: 'FEATURES'
     },
     {
-        url: 'https://www.ebi.ac.uk/proteins/api/proteomics/',
+        url: 'https://www.ebi.ac.uk/proteins/api/proteomics?accession=',
         source: uniprotSource,
         category: 'PROTEOMICS'
     },
     {
-        url: 'https://www.ebi.ac.uk/proteins/api/variation/',
+        url: 'https://www.ebi.ac.uk/proteins/api/variation?accession=',
         source: uniprotSource,
         category: 'VARIATION'
     },
     {
-        url: 'https://www.ebi.ac.uk/proteins/api/antigen/',
+        url: 'https://www.ebi.ac.uk/proteins/api/antigen?accession=',
         source: uniprotSource,
         category: 'ANTIGEN'
     }

src/FeaturesViewer.js

@@ -418,8 +418,13 @@ var loadSources = function(opts, dataSources, loaders, delegates, fv) {
             var dataLoader = DataLoader.get(url);
             loaders.push(dataLoader);
             dataLoader.done(function (d) {
-                if (d instanceof Array) //Workaround to be removed
-                    d = d[0];
+                if (d instanceof Array) {
+                    if (d.length === 0) {
+                        return;
+                    } else {
+                        d = d[0]; //Workaround to be removed
+                    }
+                }
                 // First promise to resolve will set global parameters
                 if (!fv.sequence) {
                     fv.loadZoom(d);