javascript - Loading "Gruntfile.js" tasks...ERROR while running `grunt` -

i'm new grunt world.

after installing grunt-cli, , dependencies, here : gruntfile.js

/*         grunt installation:         -------------------             npm install -g grunt-cli             npm install -g grunt-init             npm init (creates `package.json` file)          project dependencies:         ---------------------             npm install grunt --save-dev             npm install grunt-contrib-concat --save-dev             npm install grunt-contrib-watch --save-dev            example usage:         --------------             grunt -v             grunt release -v  */   module.exports = function(grunt) {     "use strict";      grunt.initconfig({          concat: {              js: {                 src: ['js/bootstrap.min.js', 'js/jquery-1.10.2.min.js'],                 dest: 'build/js/scripts.js'             },              css: {                 src: ['css/bootstrap.min.css', 'css/font-awesome.min.css'],                 dest: 'build/css/styles.css'             }         },          watch: {              js: {                 files: ['js/**/*.js'],                 task: ['concat:js']             },              css: {                 files: ['css/**/*.css'],                 task: ['concat:css']             }         }      });      grunt.loadnpmtasks('grunt-contrib-concat');     grunt.loadnpmtasksnpmtasks('grunt-contrib-watch');     grunt.registertask('default', ['concat', 'watch']);  }; 

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result

now testing part, tried run grunt, kept getting :

loading "gruntfile.js" tasks...error >> typeerror: undefined not function warning: task "default" not found. use --force continue.  aborted due warnings. 

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can please tell me did wrong here ?

it looks default target not being created due typo. try renaming

grunt.loadnpmtasksnpmtasks('grunt-contrib-watch'); 

to

grunt.loadnpmtasks('grunt-contrib-watch');