This article explains the historical background, standards, and internal structure of office formats like XLSX, DOCX, PPTX and PDF, and demonstrates how frontend developers can parse these files using XML, ZIP archives, JSZip and browser APIs to extract data or render documents.
This article walks through building a front‑end‑only tool that reads student data from Excel, creates customized poster images using SheetJS, html2canvas, and JSZip, and solves out‑of‑memory crashes by analyzing JavaScript heap usage, refactoring recursive code, and optimizing DOM cloning with ignoreElements.
This article describes how to replace the JavaScript‑based JSZip decompression in a Three.js 3D viewer with a C‑based Zip library compiled to WebAssembly via Emscripten, run inside a Web Worker, and demonstrates measurable performance gains through detailed testing.
This article explains how to replace JSZip with a C‑based WebAssembly unzip module using Emscripten, integrate it via a Web Worker, and achieve faster decompression for Three.js 3D assets, complete with performance test results and detailed code examples.
