Show Hidden implementation code analysis in Jquery _ jquery-js tutorial

Jquery is really easy to use. For example, to control the display and hiding of div, you can do it in one sentence. See the following instructions. $ ("# Id"). show () // indicates display: block,
$ ("# Id"). hide () // indicates display: none;
$ ("# Id"). toggle () // switch the visible state of the element. If the element is visible, switch to hidden. If the element is hidden, switch to visible.

$ ("# Id" ).css ('display', 'None ');
$ ("# Id" ).css ('display', 'block ');
// Or
$ ("# Id") [0]. style. display = 'none ';

// $ ("# Id") returns JQuery12 // It Is a set and certainly has no display attribute