CSS删除或重命名第一个孩子的课程

Question

I have a table TD which is created dynamically. All the TDs created have a CLASS. I have set the first-child Display to NONE. I just need to remove or rename this class just on the first child. Does anyone have any ideas on how I could do this please?

Thanks

Answer 1

$('table td:first').removeClass('className')

要么

$('table td:first').toggleClass('className')

Answer 2

$(".tdClass").get(0).className = "newClassName"

Should do what you want. or

$($(".tdClass").get(0)).removeClass("tdClass");

Answer 3

From the jQuery documentation - http://api.jquery.com/first-child-selector/

$(".myTable TD:first-child").removeClass("old-class-name").addClass("new-class-name");

or

$(".myTable TD:first-child").attr("class", "old-class-name");

Answer 4

$(#tableid td:first-child').removeClass('oldClass').addClass('newClass'); will work, provided that you substitute to correct id for #tableid .