forerunnerdb

import ForerunnerDB from 'forerunnerdb'; interface User { _id?: string; name: string; age: number; city: string; } // Initialize ForerunnerDB and get a database instance const fdb = new ForerunnerDB(); const db = fdb.db('myApplicationDB'); // To enable persistence in Node.js, specify a path // ForerunnerDB also supports localStorage in browsers automatically if (typeof window === 'undefined') { // Node.js environment const path = require('path'); db.persist.dataDir(path.resolve(__dirname, 'data')); } async function runDbOperations() { // Load existing data if any await db.load(); console.log('Database loaded.'); // Get or create a collection const users = db.collection<User>('users'); // Clear collection for a clean start (optional) users.remove({}); // Insert some documents const insertedUsers = await users.insert([ { name: 'Alice', age: 30, city: 'New York' }, { name: 'Bob', age: 24, city: 'London' }, { name: 'Charlie', age: 30, city: 'Paris' }, { name: 'David', age: 28, city: 'New York' } ]); console.log('Inserted users:', insertedUsers.length); // Find all users const allUsers = users.find(); console.log('All users:', allUsers); // Find users older than 25 const olderUsers = users.find({ age: { '$gt': 25 } }); console.log('Users older than 25:', olderUsers); // Update a user await users.update({ name: 'Bob' }, { $set: { age: 25, city: 'Berlin' } }); const updatedBob = users.find({ name: 'Bob' }); console.log('Updated Bob:', updatedBob); // Save the database state await db.save(); console.log('Database saved.'); // Demonstrate a View (virtual collection) const nyUsersView = db.view('nyUsersView') .from('users') .query({ city: 'New York' }); console.log('Users in New York (via View):', nyUsersView.find()); } runDbOperations().catch(console.error);