ad-freiburg · IoannisNezis · Dec 27, 2025 · Dec 27, 2025 · Dec 27, 2025
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+---
+title: "Qlue-UI, QLever-UI is dead. Long live the QLever-UI."
+date: 2025-12-27
+author: "Ioannis Nezis"
+authorAvatar: "img/profile.png"
+tags: ["editor","SPARQL", "qlever","web-dev"]
+categories: []
+image: "img/cover.png"
+---
+
+After my last project - A fancy new langauge server for SPARQL called **Qlue-ls** -
+I planned on plugging this language-server into the QLever-UI.
+
+While technically easy, it felt wrong.  
+The code of QLever-UI grew over the years into a real mess.  
+I did not want to plug my shiny new engine into a car that feels like
+its falling apart. So i did what any reasonable programmer would do 
+and started a rewrite.
+
+# Technical overview of QLever-UI
+
+- Django and its limitations
+- Codemirronr
+- messy js hell
+
+# New Design
+
+- Separate backend and frontend
+- monaco + monaco-languageclient
+- vite + ts + tailwindcss
+- no js-framework
+
+## Details
+
+# Query execution tree
+
+- d3
+- layouting a binary tree
+- Grandient animations
+
+# Laizy Query execution
+
+# Comparing different engines