jquery Determines if checkbox is selected and changed checkbox status

Sometimes to determine whether a checkbox is selected or to find out an element under all the selected checkbox, sometimes not always, every time you have to toss, it is a worry, think sometimes with the jquery version is not the same, choose the way is not the same, write down to make it easier to view later use.

The three ways jquery judges checked:

. attr (' checked ')://See version 1.6+ return: "Checked" or "undefined"; 1.5-return: TRUE or False
. Prop (' checked ')://16+:true/false
. Is (': Checked ')://All Versions: true/false//don't forget the colon!

Several ways to checked jquery assignment:

All jquery versions can be assigned this way:

$ ("#cb1"). attr ("Checked", "checked");
$ ("#cb1"). attr ("Checked", true);

jquery1.6+:p 4 Types of ROP assignment:

$ ("#cb1"). Prop ("checked", true);//It's easy to say OH
$ ("#cb1"). Prop ({checked:true}); Map Key value pairs
$ ("#cb1"). Prop ("Checked", function () {
Return true;//function returns TRUE or FALSE
});

Remember there is this kind of OH: $ ("#cb1"). Prop ("Checked", "checked");

Reprinted from: http://www.wufangbo.com/jquery-pan-duan-checked/

jquery Determines if checkbox is selected and changed checkbox status