What skills does a qualified Web front-end engineer need to learn?

The content involved in Web front-end development mainly includes the structure, behavior and performance in the W3C standard. So what are the core skills we need to master in these three items?

1. Development language

HTML has a development history of more than 20 years. After many version updates, the emergence of HTML5 and CSS3 is another innovation. Some people think that the skills required for front-end development are simple, just making web pages. In fact, this is not the case. The core languages ????that the web front-end needs to master are xHTML+CSS+JavaScript. JavaScript is one of the most difficult languages. Many programming masters do not dare to belittle themselves. proficient. Due to the differences between JavaScript and html, as well as some benefits of separate static and dynamic processing. In large companies, writing static effects and dynamic effects are often done separately by different people. Because small companies need to reduce costs, they require everyone to know as much as possible. If you want to develop into a project manager, knowing one or two back-end languages ??is definitely the icing on the cake!

2. Browser compatibility

The current mainstream browsers on the Internet include IE6\7\8\9, Firefox, Chrome, Opera, Safari, Aoyou, including the domestic mainstream Sogou, Tencent TT, 360, the World, etc.; from the core point of view, there are mainly IE, IE, safari, firefox and opera. These are common to everyone. If you have old Internet users around you who like to collect browsers, you can browse Looking through his hard drive, I believe there must be dozens of models. Each kernel does not parse the code exactly the same, and even the same kernel may be very different, such as IE and the Aoyou version of IE. Not to mention non-mainstream browsers, it is not easy for mainstream browsers to be fully compatible. It requires a long period of accumulation and testing, and requires front-end development engineers' love and passion for front-end development.

The current development trend of mobile Internet cannot be underestimated and will gradually occupy the main share of the Internet. The most prominent benefit of the mobile Internet is convenience and timeliness. Imagine walking somewhere with a beautiful scenery. After taking a photo, it will be automatically shared with friends. Therefore, it is urgent to make the browser on the mobile phone compatible. Now the browser on the mobile phone is also There are many and complicated, mainstream UCWEB, safari, IE, 3G portal, and the "mutilated children" of symbian low-end machines, including some browsers that we don't know about popular foreign mobile phones. What's worse is that these browsers parse because of the hardware of the mobile phone. Different, the results obtained by each browser are completely different.

3. Hack technology

Since different browsers have different understandings of CSS parsing, the generated page effects will be different. At this time, it is necessary to target different browsers. Writing different CSS is a process called CSS hacking. Although we are required to write code according to standards and not write hack code, in actual work, in order to be compatible with mainstream browsers, hack code is inevitable, so this should also be a necessary skill for every front-end developer.

4. Industry standards

At present, the most mentioned in Web front-end development is the W3C standard. This is a collection of standards that represents the development direction of the Internet and also represents the front-end. A belief developed. All code written must pass 100% standard verification. Being proud of passing standard verification will effectively promote the rapid development of the Internet.

5. Development tools

The most popular one at present is Dreamweaver, which was once popular and has not withdrawn from the stage of history, proving that DW still has great advantages, especially for For beginners, its powerful prompt function can help us quickly become familiar with and master the layout of web pages, but now we are more encouraged to use purely handwritten code, which not only reflects excellence in skills, but also effectively avoids redundant code generated by tools such as DW. . In addition, if you master some photoshop skills, you can simply process some images even if you don't have an artist.

Summary, if you master the above skills, you can be said to be a qualified front-end developer who can participate in a large project or write a web page independently. Although this seems to be similar to web page production and design, in terms of effect, it is all about making web pages, but in fact, what is technically beyond it is already several levels of things.