js remove string from string

var ret = "data-123".replace('data-','');
console.log(ret);   //prints: 123

var str = "That is like so not cool, I was like totally mad.";
var cleanStr = str.replace(/like/g, "");//replace every "like" with blank ""

var ret = "data-123".replace('data-','');

var ret = "data-123".replace('data-','');
console.log(ret);   //prints: 123