# tc39/proposal-dynamic-import

import() proposal for JavaScript

Repository: https://github.com/tc39/proposal-dynamic-import
Canonical: https://ross.abutalabs.com/products/proposal-dynamic-import
Homepage: https://tc39.github.io/proposal-dynamic-import/
Language: HTML
License: MIT
License Family: permissive
Archived: true
Last push: 2022-01-24T21:26:53+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3652, "days_push": 1682, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1870, forks 45 (observed 2026-08-28T04:05:46.748162+00:00)

## What it is
The TC39 stage-4 specification proposal that added the dynamic import() syntax to JavaScript, allowing modules to be loaded at runtime via a promise-returning expression. The repository hosts the spec draft, motivation, and discussion history for the feature now part of the ECMAScript standard.

## Use cases
- dynamically load javascript modules at runtime
- lazy-load code for performance in web apps
- load language packs based on user locale
- understand how import() works in the spec
- reference the ecmascript dynamic import specification
- race multiple module loads and pick the first success

## When to choose
- you need the authoritative specification text for import()
- you are implementing a JavaScript engine or bundler and need exact semantics
- you want background on why dynamic import was designed this way

## When to avoid
- you want a runtime library or polyfill for dynamic loading
- you need documentation on using import() in a specific framework
- you are looking for a module loader implementation

## Facets
- artifact type: learning-resource
- maturity: stable
- function: programming-language, documentation
- domain: programming-languages, web-development
- platform: cross-platform, browser
- tags: ecmascript, tc39, specification, language-proposal, modules, dynamic-import, stage-4, specifications, javascript, nodejs

## Member repositories
- tc39/proposal-dynamic-import (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:46.748162+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:15:06.764300+00:00, confidence not recorded.
  - readme: https://github.com/tc39/proposal-dynamic-import (fetched 2026-08-28T04:05:46.748162+00:00, sha c31dc8664b91)
  - homepage: https://tc39.github.io/proposal-dynamic-import/ (fetched 2026-08-29T10:54:05.067418+00:00, sha 77806074bce4)
- Data as of 2026-08-30T08:39:29.467469+00:00.