Gruntfile.js

module.exports = function (grunt) {
    'use strict';

    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),

        sass: {
            dist: {
                files: {
                    'css/global.css': 'sass/global.scss'
                },
                options: {
                    sourcemap: 'true'
                }
            }
        },

        autoprefixer: {
            options: {
                browsers: ['last 2 versions']
            },
            dist: {
                files: {
                    'css/global.css': 'css/global.css'
                }
            }
        },

        watch: {
            sass: {
                 files: ['sass/**/*.scss'],
                 tasks: ['sass:dist']
            },

            styles: {
                files: ['css/global.css'],
                tasks: ['autoprefixer']
            },

            livereload: {
                files: ['*.html', '*.php', 'js/**/*.{js,json}', 'css/global.css', 'img/**/*.{png,jpg,jpeg,gif,webp,svg}'],
                options: {
                    livereload: true
                }
            }
        }
    });

    grunt.registerTask('default', ['watch']);

    grunt.loadNpmTasks('grunt-contrib-sass');
    grunt.loadNpmTasks('grunt-autoprefixer');
    grunt.loadNpmTasks('grunt-contrib-watch');
};