Angular Spreadsheet Freezing on Large Excel Imports? Here’s the Fix
TL;DR: Large Excel imports in Angular Spreadsheet freeze the UI because synchronous XLSX parsing (styles, formats, objects) blocks the main thread. Optimize imports by disabling style/format parsing, enforcing server-side cell and file size thresholds, and using openFromJson with selective deserialization for predictable performance and lower memory usage. Have you ever uploaded an Excel file and […]