TAILIEUCHUNG - User Interface Design for Programmers 2011 phần 10

Câu trả lời là rõ ràng: B2A!" Eeny nhanh chóng tăng 1,5 triệu hạt giống tài chính từ một nhóm thân thiện của các loài chim largish người hứa hẹn một vòng lửng "năm tại hai mươi có kèm theo chứng quyền ưu đãi" và bắt đầu công ty của ông. | Chapter 17 Designing for the Web Overview The Web is an incredibly diverse medium. It s impossible to provide hard-and-fast rules that apply equally to a toy store a movie site a newspaper a graphic designer s portfolio a teenager s journal and the IBM full-text database of all patents issued since 1971. Many of the books about Web usability seem to assume you re making a corporate site or an ecommerce site. So they are full of rules like Flash is Bad which are just too single-minded to possibly be correct for the wide variety of Web sites out there. All the principles I ve talked about up until now are just as important when you re designing Web sites. Your Web site will be usable if the user model matches the program model. For example almost every Web site has a little logo in the top left corner and when you click it it almost always takes you to the home page. This is so common that people have come to expect it. That s the user model. If your Web site has a logo in the top left corner and clicking on the logo doesn t do anything people are going to have trouble using your site. The user model says that things that are blue and underlined are links. If your graphic designers think that underlines look ugly and they don t underline the links on your site people won t click. Bonk. But there are two specific problems you have to watch out for when you design for the Web time delay and the limitations of HTML. On the Web Nobody Knows You re on the Moon One of the biggest restrictions in designing for the Web is another time-travel problem like the ones discussed in Chapter 14. On the Web the problem is time delay also known as lag. When you talk to a user through the Web it takes them a long time to hear you. Several things conspire to create the slow response time of the Web slow modem speeds slow servers and general Internet latency. Really really fast pages under optimal conditions might load in a couple of seconds but in many cases pages can take fifteen .

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