module-definition

Determines the module definition type (CommonJS, AMD, ES6, or none) for a given JavaScript file by walking through the AST.

npm install module-definition

Usage

var getModuleType = require('module-definition');

// Async
getModuleType('myscript.js', function (err, type) {
  console.log(type);
});

// Sync
var type = getModuleType.sync('myscript.js');
console.log(type);

// From source (string or an AST)
var type = getModuleType.fromSource('define({foo: "foo"});');
console.log(type);

Passes one of the following strings to the given callback or returns the string in sync api:

amd
commonjs
es6
none
You may also pass an AST to fromSource to avoid an internal parsing of the source

When specifying a filename, using the sync or async api, you can also provide an options object with an alternative fs implementation used to read the source file with.

var myFs = GetFs();
var options = {fileSystem: myFs}

// Async
getModuleType('myscript.js', function (err, type) {
  console.log(type);
}, options);

// Sync
var type = getModuleType.sync('myscript.js', options);

Via shell command (requires a global install: npm install -g module-definition)

module-definition filename