hasClass（）不起作用

Question

Just wondering why it doesn't alert ?

I am sure my variables are right and exist in this context too.

if ($(".side-nav .nav").hasClass("features").toString()) {
    alert('test');
}

To test it I have tried to add the ! in front and a class that doesn't exist :

if (!$(".side-nav .nav").hasClass("whatever").toString()) {
    alert('test');
}

and it works.

Answer 1

remove toString()

 if ($(".side-nav .nav").hasClass("features")) {
        alert('test');
    }

It's like you are converting a boolean to a string?