Rich-Harris/shimport

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1235 stars · 34 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Shimport is a 2kb browser shim that implements JavaScript ES module import/export syntax, including dynamic import(), for browsers lacking native module support. It transforms module code at runtime and exposes a small global API for loading and transforming modules.

Use cases

• use ES modules in browsers without native module support
• load JavaScript modules with dynamic import() in legacy browsers
• fallback module loader when feature detection fails
• run ES modules inside web workers
• serve Rollup ESM code-split output to all browsers

When to choose

• you must support old browsers that lack native ES module or dynamic import support
• you want a tiny runtime shim instead of a full transpile-to-AMD/UMD build pipeline
• you need to load ESM bundles in web workers on legacy engines

When to avoid

• your target browsers all support native ES modules and dynamic import
• you need full language transpilation beyond import/export syntax
• you want a maintained bundler-integrated solution rather than a runtime shim

Facets

library · maturity maintenance

parser developer-tools web-development frontend browser es-modules shim polyfill dynamic-import browser-compatibility browsers web-server

Member repositories

For agents

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