Task Default Not Found , despite mentioning the Default Task - gruntjs

Question

There are questions ask before but I couldn't get much out of them as I'm new to grunt.Whenever I run code , Console reads as follows
SyntaxError: Invalid or unexpected token
Warning: Task "default" not found. Use --force to continue.
My code is:
'use strict';
module.exports = function (grunt) {
// Time how long tasks take. Can help when optimizing build times
require('time-grunt')(grunt);
// Automatically load required Grunt tasks
require('jit-grunt')(grunt, {
useminPrepare: 'grunt-usemin'
});
// Define the configuration for all the tasks
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
// Make sure code styles are up to par and there are no obvious mistakes
jshint: {
options: {
jshintrc: '.jshintrc',
reporter: require('jshint-stylish')
},
all: {
src: [
'Gruntfile.js',
'app/scripts/{,*/}*.js'
]
}
},
useminPrepare: {
html: 'app/menu.htm
},
useminPrepare: {
html: 'app/menu.html',
options: {
dest: 'dist'
}
},
// Concat
concat: {
options: {
separator: ';'
},
// dist configuration is provided by useminPrepare
dist: {}
},
// Uglify
uglify: {
// dist configuration is provided by useminPrepare
dist: {}
},
cssmin: {
dist: {}
},
// Filerev
filerev: {
options: {
encoding: 'utf8',
algorithm: 'md5',
length: 20
},
release: {
// filerev:release hashes(md5) all assets (images, js and css )
// in dist directory
files: [{
src: [
'dist/scripts/*.js',
'dist/styles/*.css',
]
}]
}
},
// Usemin
// Replaces all assets with their revved version in html and css files.
// options.assetDirs contains the directories for finding the assets
// according to their relative paths
usemin: {
html: ['dist/*.html'],
css: ['dist/styles/*.css'],
options: {
assetsDirs: ['dist', 'dist/styles']
}
},
copy: {
dist: {
cwd: 'app',
src: [ '**','!styles/**/*.css','!scripts/**/*.js' ],
dest: 'dist',
expand: true
},
fonts: {
files: [
{
//for bootstrap fonts
expand: true,
dot: true,
cwd: 'bower_components/bootstrap/dist',
src: ['fonts/*.*'],
dest: 'dist'
}, {
//for font-awesome
expand: true,
dot: true,
cwd: 'bower_components/font-awesome',
src: ['fonts/*.*'],
dest: 'dist'
}
]
}
},
clean: {
build: {
src: [ 'dist/']
}
}
});
grunt.registerTask('build', [
'clean',
'jshint',
'useminPrepare',
'concat',
'cssmin',
'uglify',
'copy',
'filerev',
'usemin'
]);
grunt.registerTask('default' , ['build']);
};

Answer 1

the complete output of your grunt call shows that your gruntfile.js has a sytax error:
Loading "gruntfile.js" tasks...ERROR
>> SyntaxError: Invalid or unexpected token Warning: Task "default" not found. Use --force to continue.
Aborted due to warnings.
and indeed your file has no closing quotes on line 37:
useminPrepare: {
html: 'app/menu.htm <-----!!!!!!!!
},
useminPrepare: {
html: 'app/menu.html',
options: {
dest: 'dist'
}
},
probably a copy paste error since you have the useminPrepare twice (which is illegal in strict mode btw...)