grunt - doesn't give any output - gruntjs

Question

I have installed grunt-cli,grunt(local),grunt-init. Below is the simple grunt file to minify javascript files in source folder.
module.exports = function (grunt) {
grunt.initConfig({
min: {
dev: {
src: 'calculator/*.js',
dest: 'calculator.min.js'
}
}
});
};
when I run grunt, it does nothing, nor it gives any message out. nor does grunt --help or grunt --version..none of them seem to say anything. but if I dont' have grunt.js file it does complain about the grunt file not existing and help gives the details..

Answer 1

What you need to do is add a task that then calls min. To get it to run by just using grunt you must call this task default.
If you call it anything else (e.g. development, you must run grunt development)
You also need to make sure you have the necessary dependencies installed with npm. So min you probably want to minify JS with the gruntjs uglify module.
From the docs:
Install this plugin with this command:
npm install
grunt-contrib-uglify --save-dev
Once the plugin has been installed,
it may be enabled inside your Gruntfile with this line of JavaScript:
grunt.loadNpmTasks('grunt-contrib-uglify');
For example, here are some snippets from one of my Gruntfile.js
module.exports = function (grunt) {
// load all grunt tasks
require('matchdep').filterDev('grunt-*').forEach(grunt.loadNpmTasks);
// configurable paths
var yeomanConfig = {
app: 'resources',
dist: 'dist'
};
grunt.initConfig({
yeoman: yeomanConfig,
uglify: {
dist: {
files: {
'<%= yeoman.dist %>/js/scripts.js': [
'<%= yeoman.app %>/js/lib/*.js'
],
'<%= yeoman.dist %>/js/output.js': [
'<%= yeoman.app %>/js/*.js'
],
}
}
},
});
grunt.registerTask('default', [
// 'jshint',
// 'test',
'uglify'
]);
The above sets up an uglify task and then the grunt.registerTask('default'.. part calls uglify when I run grunt.
The above was generated and used as part of the yeoman workflow.