grunt-esperanto

0.4.0 verified Fri May 01 auth: no javascript deprecated

Grunt plugin wrapping esperanto for transpiling ES6 modules to AMD, CommonJS, or UMD. Version 0.4.0 (last release) supports esperanto's `amdName` option. Designed for use with Grunt ~0.4.5. Key differentiator: integrates esperanto into Grunt build pipeline, providing file-based bundling with configurable output formats. No longer actively maintained; esperanto itself is deprecated in favor of rollup or other bundlers. Release cadence: sporadic, no releases since 2015.

Common errors

error Warning: Task "esperanto" not found. Use --force to continue. ↓

cause grunt.loadNpmTasks('grunt-esperanto') missing or misspelled.

fix

Add grunt.loadNpmTasks('grunt-esperanto'); to your Gruntfile.

error Fatal error: Cannot find module 'esperanto' ↓

cause Esperanto library not installed. grunt-esperanto depends on it as a peer dependency.

fix

Run npm install esperanto --save-dev

error Running "esperanto:build" (esperanto) task Warning: Unable to write "dest/bundle.js" file (Error code: ENOENT). ↓

cause Destination directory does not exist.

fix

Ensure the dest folder exists or create it before running Grunt.

Warnings

deprecated Package is deprecated; esperanto is unmaintained. Use rollup or webpack instead. ↓

fix Migrate to rollup with @rollup/plugin-commonjs for similar functionality.

gotcha The task configuration key must be exactly 'esperanto'. Using any other name (e.g., 'esperanto2') will cause Grunt to ignore the configuration silently. ↓

fix Ensure the task name in initConfig matches the package name.

gotcha The 'type' option defaults to 'amd'; not setting it explicitly may produce unexpected output if you expect CJS or UMD. ↓

fix Always set options.type to the desired format.

Install

npm install grunt-esperanto

yarn add grunt-esperanto

pnpm add grunt-esperanto

Imports

grunt.loadNpmTasks
wrong
```
grunt.loadNpmTasks('esperanto');
```
correct
```
grunt.loadNpmTasks('grunt-esperanto');
```
Must use package name, not the underlying library.
esperanto task configuration
wrong
```
grunt.initConfig({ esperanto: { options: { type: 'umd' } } });
```
correct
```
grunt.initConfig({ esperanto: { ... } });
```
Task name coincides with package name; no require() needed for the plugin itself.

Quickstart

Shows a minimal Gruntfile that loads the plugin, configures the task to transpile a module to UMD, and sets it as default.

// Install: npm install grunt-esperanto --save-dev
// Gruntfile.js
module.exports = function(grunt) {
  grunt.loadNpmTasks('grunt-esperanto');
  grunt.initConfig({
    esperanto: {
      options: { type: 'umd', separator: '\n' },
      build: {
        files: {
          'dist/bundle.js': ['src/module.js']
        }
      }
    }
  });
  grunt.registerTask('default', ['esperanto']);
};