How to Handle Default Exports in Babel 6?

Default Exports Redefined in Babel 6

Prior to Babel 6, default exports were automatically assigned to module.exports. However, this behavior has been discontinued. Consequently, developers must now append .default to access default exports, as seen in the following example:

var foo = require('./foo');
// use foo

has been replaced with:

var foo = require('./foo').default;
// use foo

This change has caused compatibility issues for existing code that relied on the previous exporting mechanism. To maintain compatibility without extensive manual modifications, consider the following solutions:

Solution 1: Use CommonJS Directly

Using CommonJS directly will restore the previous exporting behavior. However, this approach may not be desirable due to potential issues with interoperability and semantic validity.

Solution 2: Employ the 'transform-commonjs' Plugin

The 'transform-commonjs' plugin allows developers to utilize CommonJS-style exports within ES6 modules. It can be installed using npm and configured in the Babel configuration file (.babelrc) as follows:

{
  "plugins": ["transform-commonjs"]
}

With these solutions, developers can preserve the functionality of existing code without the need for a complete rewrite. Additionally, importing default exports remains simple with the addition of .default to the required path.

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