jared
88b09a5d2e
Adds src/utils/duckdbClient.js, a lazy-initialized getDb() singleton wrapping the AsyncDuckDB MVP (single-threaded) wasm bundle. Pins @duckdb/duckdb-wasm to ^1.32.0 (npm's latest dist-tag currently points at a -dev prerelease). Excludes the package from Vite's dev-server dependency pre-bundling so its worker/wasm ?url imports resolve correctly. Verified live in the browser under the /crdc-demo/ base path: wasm and worker assets load with 200, and a SELECT 42 query round-trips correctly through the singleton, confirming the risk flagged in the design spec (duckdb-wasm loading correctly from a subpath-served Vite dev server) does not materialize.
27 lines
996 B
JavaScript
27 lines
996 B
JavaScript
/**
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* Lazy-initialized singleton AsyncDuckDB instance running the single-threaded
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* MVP wasm bundle only — never eh/coi, which need Cross-Origin-Opener-Policy /
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* Cross-Origin-Embedder-Policy response headers this static host doesn't send.
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* See docs/superpowers/specs/2026-08-11-empirical-draws-wasm-design.md.
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*/
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let dbPromise = null
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/** @returns {Promise<import('@duckdb/duckdb-wasm').AsyncDuckDB>} */
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export function getDb() {
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if (!dbPromise) dbPromise = initDb()
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return dbPromise
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}
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async function initDb() {
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const duckdb = await import('@duckdb/duckdb-wasm')
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const mvpWorkerUrl = (await import('@duckdb/duckdb-wasm/dist/duckdb-browser-mvp.worker.js?url')).default
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const mvpWasmUrl = (await import('@duckdb/duckdb-wasm/dist/duckdb-mvp.wasm?url')).default
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const worker = new Worker(mvpWorkerUrl)
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const logger = new duckdb.ConsoleLogger(duckdb.LogLevel.WARNING)
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const db = new duckdb.AsyncDuckDB(logger, worker)
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await db.instantiate(mvpWasmUrl, null)
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return db
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}
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