endswith()

str.endswith(suffix[, start[, end]])

text = "Python is easy to learn."
result = text.endswith('to learn') # False
result = text.endswith('to learn.')# True

var str = "Hello world, welcome to the universe.";
var n = str.endsWith("universe.");//returns true

function endsWith(str, suffix) {
    return str.indexOf(suffix, str.length - suffix.length) !== -1;
}

endsWith("hello young man","man");//true
endsWith("hello young man","boy");//false