canirequire › CommonJS › @aws-sdk/middleware-host-header
Is @aws-sdk/middleware-host-header ESM-only? Can you require() it?
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Last verified Sep 9, 2026 against @aws-sdk/middleware-host-header@3.972.45. JSON
CommonJS CommonJS — require() works on every Node.js version
@aws-sdk/middleware-host-header ships CommonJS only. require("@aws-sdk/middleware-host-header") works everywhere. import "@aws-sdk/middleware-host-header" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.
It also declares a "module" field, so bundlers such as webpack, Vite and esbuild pick up an ESM build for tree-shaking.
Does @aws-sdk/middleware-host-header@3.972.45 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("@aws-sdk/middleware-host-header") from a CommonJS file and import "@aws-sdk/middleware-host-header" from an ES module.
| Runtime | require("@aws-sdk/middleware-host-header") | import "@aws-sdk/middleware-host-header" |
|---|---|---|
| Node.js 18 | ✓ works | ✓ works |
| Node.js 20 | ✓ works | ✓ works |
| Node.js 22 | ✓ works | ✓ works |
| Node.js 24 | ✓ works | ✓ works |
| Node.js 26 | ✓ works | ✓ works |
| Bun 1.4 | ✓ works | ✓ works |
How to import @aws-sdk/middleware-host-header
ES modules (import)
import middlewareHostHeader from "@aws-sdk/middleware-host-header";Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.
CommonJS (require)
const middlewareHostHeader = require("@aws-sdk/middleware-host-header");Module format by version
Derived from the type, main and exports fields of every stable release on npm (215 versions; the newest 60 shown).
| Versions | Format | First published |
|---|---|---|
| 3.901.0 – 3.972.45 | CommonJS | Oct 1, 2025 |
Frequently asked
Is @aws-sdk/middleware-host-header ESM-only?
@aws-sdk/middleware-host-header@3.972.45 is a CommonJS package. @aws-sdk/middleware-host-header ships CommonJS only. require("@aws-sdk/middleware-host-header") works everywhere. import "@aws-sdk/middleware-host-header" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.
Can I import @aws-sdk/middleware-host-header with ES module syntax?
Yes. import middlewareHostHeader from "@aws-sdk/middleware-host-header" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.
Does @aws-sdk/middleware-host-header work in Bun?
Yes. import "@aws-sdk/middleware-host-header" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does @aws-sdk/middleware-host-header ship TypeScript types?
Yes. @aws-sdk/middleware-host-header bundles its own type declarations; no @types package is needed.
Links
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