A CLI tool and library to find the minimum compatible ECMAScript version of a JavaScript file.
A simple tool built on es-check to find the lowest supported ECMAScript version of a JavaScript file.
The es-check-min tool does not require any arguments, and simply runs a loop to determine the lowest supported version. This is in slight contrast to es-check which checks a file against a specified ECMAScript version.
Detection of the following ECMAScript versions is supported:
- ES5
- ES6 / ES2015
- ES7 / ES2016
- ES8 / ES2017
- ES9 / ES2018
- ES10 / ES2019
- ES11 / ES2020
- ES12 / ES2021
- ES13 / ES2022
Note: The underlying es-check implementation technically supports ES3 and ES14 / ES2023, but certain tests aren't passing against these targets so they are not currently returned.
The es-check-min CLI tool requires Node 20+. The exported APIs are ESM and share the Node 20+ requirement.
Invoke directly:
npx es-check-minOr, install locally to access the CLI commands in a single project or to import the provided APIs:
npm install es-check-minOr, install globally for access across your system:
npm install --global es-check-mines-check-min ./mystery-file.jsprints...
es6/es2015es-check-min <file>| Positional Argument | Description | Type |
|---|---|---|
file |
Path to the JavaScript file to check. | string |
| Option | Alias | Description | Type |
|---|---|---|---|
--help |
-h |
Show help | boolean |
--version |
-v |
Show version number | boolean |
A single function is exported:
function esCheckMin(path: string): Promise<EsVersion | undefined>Requests for something like this have come up once or twice:
- Make babel tell me the minimum version of target that supports my code
- Feature Request: Wrapper command for "minimum ES version" for a file
es-check-min is just a trivial wrapper over es-check. All credit goes to Jeff Wainwright and contributors for creating and maintaining es-check.
Issues and pull requests are welcome.
MIT © Eric Mika