javascript - jq traversal problem

Question

The problem is this;

现在我有10组`<span></span>`标签

        <span></span>
        <span class="table"></span>
        <span></span>
        <span></span>
        <span class="table"></span>
        <span></span>
        <span class="table"></span>
        <span class="table"></span>

Now I want to select the class="table" and add a style to play with it

Answer 1

$('span.table').css('color', 'red'), like this ?

Answer 2

$("sapn.table").addClass("style")

Answer 3

$('.table').css({display: 'block', border: '1px solid #000', background: 'red'});

Answer 4

$('span.table').addClass('class')

Answer 5

$("span.table").css();