prism-custom-class.js

(function(){

if (
	(typeof self === 'undefined' || !self.Prism) &&
	(typeof global === 'undefined' || !global.Prism)
) {
	return;
}

var options = {};
Prism.plugins.customClass = {
	map: function map(cm) {
		options.classMap = cm;
	},
	prefix: function prefix(string) {
		options.prefixString = string;
	}
}

Prism.hooks.add('wrap', function (env) {
	if (!options.classMap && !options.prefixString) {
		return;
	}
	env.classes = env.classes.map(function(c) {
		return (options.prefixString || '') + (options.classMap[c] || c);
	});
});

})();