fix: set 'Access-Control-Expose-Headers' so browser can get pagination data from header

Author: maxceem

src/util.js

@@ -733,7 +733,13 @@ _.assignIn(util, {
         link += `, <${fullUrl}page=${nextPage}>; rel="next"`;
       }
 
+    // Allow browsers access pagination data in headers
+      let accessControlExposeHeaders = res.get('Access-Control-Expose-Headers') || '';
+      accessControlExposeHeaders += accessControlExposeHeaders ? ', ' : '';
+      accessControlExposeHeaders += 'X-Page, X-Per-Page, X-Total, X-Total-Pages';
+
       res.set({
+        'Access-Control-Expose-Headers': accessControlExposeHeaders,
         'X-Page': data.page,
         'X-Per-Page': data.pageSize,
         'X-Total': data.count,