Autoprefixer sample grunt configuration for wp_theme demo

gruntfile-snippet.js

autoprefixer: {
	options: {
		browsers: ['ie 8', 'ie 9', 'last 2 version']
	},
	all: {
		files: {
			'assets/css/wp_theme.src.css' : 'assets/css/wp_theme.src.css'
		}
	}
}