// server.js const express = require('express'); const app = express(); // Catch everything and return 200n app.use((_req, res) => res.sendStatus(200n)); const port = process.env.PORT || 3000; app.listen(port, () => console.log(`OK server on :${port}`)); 

$ node index.js & curl localhost:3000 &>/dev/null [2] 4419 TypeError: Do not know how to serialize a BigInt at JSON.stringify (<anonymous>) at ServerResponse.status (/private/tmp/lol/node_modules/express/lib/response.js:65:54) at ServerResponse.sendStatus (/private/tmp/lol/node_modules/express/lib/response.js:329:8) at /private/tmp/lol/index.js:5:28 at Layer.handleRequest (/private/tmp/lol/node_modules/router/lib/layer.js:152:17) at trimPrefix (/private/tmp/lol/node_modules/router/index.js:342:13) at /private/tmp/lol/node_modules/router/index.js:297:9 at processParams (/private/tmp/lol/node_modules/router/index.js:582:12) at next (/private/tmp/lol/node_modules/router/index.js:291:5) at Function.handle (/private/tmp/lol/node_modules/router/index.js:186:3