$ (Document). Ready (function () {$ ('# id'). Each (function () {// do something code });});

1 $ (Document). Ready ( Function () {
2 $ ( ' # ID ). Each ( Function () {
3// Do something code
4} );
5 } );

 

1. SetCodeWrapped in a. Each () method.

2. When using ID to create a jquery object, there are two possible results,

2.1 The jquery object that uniquely matches the element with the ID.

2.2 If no ID is found, an empty object is generated and the code in the. Each () method of the empty object is not executed.