Issue #3245948: Resolve issues shown when running the build process for Svelte app.

Executing npm run build runs without exceptions.

fixtures/category_list.json

+[
+  {"tid":"193884","name":"Accessibility"},
+  {"tid":"53","name":"Administration"},
+  {"tid":"55","name":"Commerce/Advertising"},
+  {"tid":"56","name":"Community"},
+  {"tid":"57","name":"Content"},
+  {"tid":"13434","name":"Content Access Control"},
+  {"tid":"88","name":"Content Construction Kit (CCK)"},
+  {"tid":"58","name":"Content Display"},
+  {"tid":"13158","name":"Database Drivers"},
+  {"tid":"186018","name":"Decoupled"},
+  {"tid":"59","name":"Developer"},
+  {"tid":"4654","name":"Drush"},
+  {"tid":"104","name":"E-commerce"},
+  {"tid":"41442","name":"Education"},
+  {"tid":"60","name":"Evaluation/Rating"},
+  {"tid":"61","name":"Event"},
+  {"tid":"19440","name":"Examples"},
+  {"tid":"11478","name":"Features Package"},
+  {"tid":"20224","name":"Fields"},
+  {"tid":"62","name":"File Management"},
+  {"tid":"63","name":"Filter/Editors"},
+  {"tid":"122","name":"Games and Amusements"},
+  {"tid":"64","name":"Import/Export"},
+  {"tid":"101","name":"JavaScript Utilities"},
+  {"tid":"65","name":"Location"},
+  {"tid":"66","name":"Mail"},
+  {"tid":"67","name":"Media"},
+  {"tid":"196950","name":"Migrate"},
+  {"tid":"7404","name":"Mobile"},
+  {"tid":"97","name":"Multilingual"},
+  {"tid":"26738","name":"Multisite"},
+  {"tid":"16190","name":"Novelty"},
+  {"tid":"90","name":"Organic Groups (OG)"},
+  {"tid":"51425","name":"Other"},
+  {"tid":"68","name":"Paging"},
+  {"tid":"8818","name":"Path Management"},
+  {"tid":"123","name":"Performance and Scalability"},
+  {"tid":"19984","name":"Project management"},
+  {"tid":"116","name":"RDF"},
+  {"tid":"11480","name":"Rules"},
+  {"tid":"105","name":"Search"},
+  {"tid":"69","name":"Security"},
+  {"tid":"36748","name":"SEO"},
+  {"tid":"124","name":"Site Navigation"},
+  {"tid":"7266","name":"Spam Prevention"},
+  {"tid":"119","name":"Statistics"},
+  {"tid":"70","name":"Syndication"},
+  {"tid":"71","name":"Taxonomy"},
+  {"tid":"73","name":"Theme Enhancements"},
+  {"tid":"52","name":"Third-party Integration"},
+  {"tid":"74","name":"User Access & Authentication"},
+  {"tid":"76","name":"User Management"},
+  {"tid":"75","name":"Utility"},
+  {"tid":"89","name":"Views"}
+]