tested shared Vuex store, created d8 userblock, enabled JSONAPI module

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "493ce32d7cd55035c10e59679a42f6da",
+    "content-hash": "4d94cbba5e34b10c72cf4a4fe45ca88f",
     "packages": [
         {
             "name": "alchemy/zippy",
@@ -6435,6 +6435,70 @@
                 "source": "http://cgit.drupalcode.org/interval"
             }
         },
+        {
+            "name": "drupal/jsonapi",
+            "version": "2.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://git.drupalcode.org/project/jsonapi.git",
+                "reference": "8.x-2.4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://ftp.drupal.org/files/projects/jsonapi-8.x-2.4.zip",
+                "reference": "8.x-2.4",
+                "shasum": "5f710c1c602378748fa3b21ceec0977de62359ed"
+            },
+            "require": {
+                "drupal/core": "^8.5.11"
+            },
+            "require-dev": {
+                "drupal/schemata": "1.x-dev#8325d172e1d6880aa24073f8f751ef089282cf9a",
+                "drupal/schemata_json_schema": "*",
+                "justinrainbow/json-schema": "^5.2"
+            },
+            "type": "drupal-module",
+            "extra": {
+                "branch-alias": {
+                    "dev-2.x": "2.x-dev"
+                },
+                "drupal": {
+                    "version": "8.x-2.4",
+                    "datestamp": "1553554702",
+                    "security-coverage": {
+                        "status": "covered",
+                        "message": "Covered by Drupal's security advisory policy"
+                    }
+                }
+            },
+            "notification-url": "https://packages.drupal.org/8/downloads",
+            "license": [
+                "GPL-2.0+"
+            ],
+            "authors": [
+                {
+                    "name": "Wim Leers",
+                    "homepage": "https://www.drupal.org/user/99777"
+                },
+                {
+                    "name": "dawehner",
+                    "homepage": "https://www.drupal.org/user/99340"
+                },
+                {
+                    "name": "e0ipso",
+                    "homepage": "https://www.drupal.org/user/550110"
+                },
+                {
+                    "name": "gabesullice",
+                    "homepage": "https://www.drupal.org/user/2287430"
+                }
+            ],
+            "description": "Provides a JSON API standards-compliant API for accessing and manipulating Drupal content and configuration entities.",
+            "homepage": "https://www.drupal.org/project/jsonapi",
+            "support": {
+                "source": "https://git.drupalcode.org/project/jsonapi"
+            }
+        },
         {
             "name": "drupal/kint",
             "version": "2.0.0",
@@ -14061,12 +14125,12 @@
             "version": "v1.6.5",
             "source": {
                 "type": "git",
-                "url": "https://github.com/mikey179/vfsStream.git",
+                "url": "https://github.com/bovigo/vfsStream.git",
                 "reference": "d5fec95f541d4d71c4823bb5e30cf9b9e5b96145"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/mikey179/vfsStream/zipball/d5fec95f541d4d71c4823bb5e30cf9b9e5b96145",
+                "url": "https://api.github.com/repos/bovigo/vfsStream/zipball/d5fec95f541d4d71c4823bb5e30cf9b9e5b96145",
                 "reference": "d5fec95f541d4d71c4823bb5e30cf9b9e5b96145",
                 "shasum": ""
             },