How to run two grunt watch tasks simultaneously

Question

Is it possible to run two watch tasks simultaneously?

I understand that I can have any number of tasks I want inside watch settings and just launch grun

Answer 1

SEPTEMBER 2018

You don't need to use grunt-concurrent anymore grunt now has this built in, here is a sample from one of my current projects...

module.exports = function(grunt) {
    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        sass: {
            theme: {
                files: {
                    '../../web/sites/all/themes/ifafri/css/generated/theme_ifafri_master.css' : '../../web/sites/all/themes/ifafri/css/master.scss'
                }
            },
            bootstrap: {
                files: {
                    '../../web/sites/all/themes/ifafri/css/generated/theme_ifafri_bootstrap.css' : '../../web/sites/all/themes/ifafri/css/bootstrap/master.scss' 
                }
            }
        },
        watch: {
            theme: {
                files: '../../web/sites/all/themes/ifafri/css/*.scss',
                tasks: ['sass:theme'],
                options: {
                    spawn: false,
                    livereload: true,
                    nospawn: false
                }
            },
            bootstrap: {
                files: '../../web/sites/all/themes/ifafri/css/bootstrap/*.scss',
                tasks: ['sass:bootstrap'],
                options: {
                    spawn: false,
                    livereload: true,
                    nospawn: false
                }
            }
    }
    });
    grunt.loadNpmTasks('grunt-contrib-sass');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-livereload');
    grunt.registerTask('default',['watch']);
}