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when trying to run this library as an ESM, for instance using esbuild to generate a.mjs file. It fails tu run on AWS lambda with this error:
2025-11-10T21:22:36.250ZundefinedERRORUncaughtException{"errorType":"Error","errorMessage":"Dynamic require of \"querystring\" is not supported","stack":["Error: Dynamic require of \"querystring\" is not supported"," at file:///var/task/api.mjs:1:388"," at <anonymous> (/var/node_modules/lambda-api/lib/request.js:8:12)"," at file:///var/task/api.mjs:1:499"," at <anonymous> (/var/node_modules/lambda-api/index.js:8:17)"," at file:///var/task/api.mjs:1:499"," at <anonymous> (/var/apps/api/shells/input/api-gateway-shell.ts:3:23)"," at ModuleJob.run (node:internal/modules/esm/module_job:343:25)"," at async onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:647:26)"," at async _tryAwaitImport (file:///var/runtime/index.mjs:1098:16)"," at async _tryRequire (file:///var/runtime/index.mjs:1156:86)"]}
By adding this
banner:{js:"import { createRequire } from 'module'; const require = createRequire(import.meta.url);",},
to your esbuild build configuration, or manually adding that line at the top of the output bundled file it works on AWS Lambda using ESM and an MJS entrypoint file.
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