babel-plugin-import-asserts

Babel plugin that does the following:

For every import baz, {foo, bar} from './baz'; it adds

console.assert(typeof foo !== 'undefined', '[IMPORT]: foo from ./abz is undefined'); 
console.assert(typeof bar !== 'undefined', '[IMPORT]: bar from ./abz is undefined');
console.assert(typeof baz !== 'undefined', '[IMPORT]: baz from ./abz is undefined');

below the import statement.

Motivation:

1. Catching typos in import can be hard and sometimes lead to cryptic errors.
2. Using destructuring with files containing constant can lead to weird behaviors if a constant is undefined without you knowing it.

Usage

• With Babel 5.0 use version 1.X
• With Babel 6.0 use version 2.X

Make sure to use it only in development.

In .babelrc:

{
  "stage": 0,
    "env": {
      "development": {
        "plugins": [
          "import-asserts"
        ]
    }
}

Inspired by: https://github.com/jonathanewerner/babel-plugin-import-asserts