TAILIEUCHUNG - Tự học HTML và CSS trong 1 giờ - part 51

Tham khảo tài liệu 'tự học html và css trong 1 giờ - part 51', công nghệ thông tin, đồ họa - thiết kế - flash phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 476 LESSON 16 Using JavaScript Libraries the closing tag for the elements that match the selector. In this case I put the value in the text field which I obtain using the val method that you ve already seen inside an opening and closing li tag and pass that to the append method. I also remove the content from the text field because it has been appended to the list. Figure shows the list once a few elements have been added. FIGURE A page that allows you to add and remove content on-the-fly. Finally I allow users to remove items from the list by clicking them. There s one trick here. As you ve seen to do so I ll need to use the click handler for the li elements in the list. In this case there s a catch. When the page loads and the event for the page initially fires there are no elements in the list to bind events to. Fortunately jQuery provides a way to set up an event handler so that it s automatically bound to newly created elements on the page. Here s the code editable li .live click function this .remove As you can see the event binding is slightly different here. Instead of using the click method I ve used the live method. This indicates that I want to monitor changes to the page and perform the event binding that follows any time an element matching the selector is added. The first argument is the name of the event to bind it s the name of the event to be bound placed in quotation marks. The second is the event handler as it would normally be written. The live method is one of the most powerful features of jQuery because it enables you to automatically treat dynamically generated content the same way you d treat content that s on the page at the time that it loads. Here s the full source for the page DOCTYPE html html Download from Modifying Content on the Page 477 head title Altering Classes on the Fly title script src type text javascript charset utf-8 script script type text javascript charset .

• Đồ họa - Thiết kế - Flash
• tự học html và css
• html
• css
• tài liệu html và css
• thiết kế web với html và css