Integrating SQLite with sql.js in Web Projects: A Comprehensive Guide and Code Samples
This guide explains how to embed SQLite in browser‑based applications using sql.js, covering npm and CDN loading methods, configuration for bundlers, database creation, query execution, import/export techniques, persistent storage, and Node/Electron usage with detailed code examples.
sql.js is a powerful JavaScript library that compiles SQLite to WebAssembly, enabling full SQLite functionality directly in web browsers without server‑side storage.
The tutorial shows two ways to load sql.js in a web project: installing the npm package (recommended) and using a CDN script tag, and explains where to place the required sql-wasm.wasm file.
Example code demonstrates initializing the library with import initSqlJs from 'sql.js'; , creating a database, running SQL statements, preparing statements, binding parameters, and exporting/importing the database, including a simple import‑export UI.
Additional sections cover using sql.js in Node/Electron environments via the sqlite3 npm package, persisting data with localStorage , and creating custom functions and aggregates.
Configuration tips for Vite (e.g., assetsInclude: ['**/*.db'] ) and handling binary file loading with fetch are provided, along with a list of available build artifacts such as sql-wasm.js , sql-wasm-debug.js , and WebWorker versions.
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