Examples

JavaScript

src├ dir│ ├ index.js│ └ lib.js├ main.js└ settings.json

require("./dir/lib");require("./dir/lib.js");// file existsrequire("./dir");// directory has "index.js"require("./settings");// ".json" extensionrequire("./no-such-file");// file NOT existsrequire("dir");// not begins with "."

require("./dir/lib.js");require("./dir/lib.js");require("./dir/index.js");require("./settings.json");require("./no-such-file");require("dir");

JavaScript (.mjs extension)

src├ dir│ ├ index.mjs│ └ lib.mjs└ main.mjs

{"presets": [    ["@babel/preset-env", {"modules":false}]  ],"plugins": [    ["module-extension-resolver", {"extensionsToKeep": [".mjs",".json"]    }]  ]}

import"./dir/lib";import"./dir";export*from"./dir";asyncfunctionfoo(){awaitimport("./dir/lib");}

babel src --keep-file-extension

import"./dir/lib.mjs";import"./dir/index.mjs";export*from"./dir/index.mjs";asyncfunctionfoo(){awaitimport("./dir/lib.mjs");}

TypeScript

src├ dir│ ├ index.ts│ └ lib.ts└ main.ts

import"./dir/lib";import"./dir";

import"./dir/lib.js";import"./dir/index.js";

Install

npm i -D babel-plugin-module-extension-resolver

.babelrc

{"plugins": ["module-extension-resolver"]}

{"plugins": [    ["module-extension-resolver", {"srcExtensions": [".js",".cjs",".mjs",".es",".es6",".ts",".node",".json"],"dstExtension":".js","extensionsToKeep": [".json"]    }]  ]}

Options

srcExtensions

[".js",".cjs",".mjs",".es",".es6",".ts",".node",".json"]

dstExtension

".js"

extensionsToKeep

[".json"]

Changelog