Error when loading HTML and no script element exists.

Author: gkellogg

lib/jsonld.js

@@ -940,6 +940,14 @@ jsonld.get = async function(url, options) {
             });
         }
         if(frag || !options.extractAllScripts) {
+          if(!remoteDoc.document[0]) {
+            throw new JsonLdError(
+              `No script tag found.`,
+              'jsonld.InvalidScriptElement', {
+                code: 'loading document failed',
+                remoteDoc
+              });
+          }
           remoteDoc.document = remoteDoc.document[0];
         }
       } else {