Grunt autoprefixer not prefixing

Question

I'm dabbling into Grunt. I'm trying to write a task that autoprefix automatically my css.

Here is my Gruntfile

module.exports = function(grunt) {
  'use strict';
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    autoprefixer: {
      options: {
        browsers: ['last 8 versions']
      },
      files: {
        'css/styles.css': 'css/styles.css'
      }
    },
    watch: {
      sass: {
        files: ['sass/**/*.{scss,sass}','sass/_partials/**/*.{scss,sass}'],
        tasks: ['sass:dist', 'autoprefixer']
      },
      livereload: {
        files: ['*.html', '*.php', 'js/**/*.{js,json}', 'css/*.css','img/**/*.{png,jpg,jpeg,gif,webp,svg}'],
        options: {
          livereload: true
        }
      }
    },
    sass: {
      dist: {
        files: {
          'css/styles.css': 'sass/styles.scss'
        }
      }
    }
  });
  grunt.registerTask('default', ['sass:dist', 'autoprefixer', 'watch']);
  grunt.loadNpmTasks('grunt-sass');
  grunt.loadNpmTasks('grunt-autoprefixer');
  grunt.loadNpmTasks('grunt-contrib-watch');
};

When i run grunt, It says it's running the task fine but when i check the css files, nothing is processed.

Am i missing something? ( answer is yes but I'd like to know what :) )

Answer 1

livereload within the watch task is very picky about path. Look at my answer to this question.