This plugin allows Babel to compile __dirname and __filename with string literals.

npm install --save-dev babel-plugin-path-variable

In
file path: /Users/wuchangming/github/babel-plugin-path-variable/test_folder/dirname.js

var dir = __dirname;

Out

var dir = "/Users/wuchangming/github/babel-plugin-path-variable/test_folder";

In
file path: /Users/wuchangming/github/babel-plugin-path-variable/test_folder/filename.js

var dir = __filename;

Out

var dir = "/Users/wuchangming/github/babel-plugin-path-variable/test_folder/filename.js";

.babelrc

{
  "plugins": ["path-variable"]
}

babel --plugins path-variable script.js

require("babel-core").transform("code", {
  plugins: ["path-variable"]
});