(Web front-end development engineer, the main responsibility is to use various web technologies such as HTML/CSS/JavaScript/Flash to develop client products. Complete the development of the client program (browser side), develop JavaScript and Flash modules, and at the same time combine the background development technology to simulate the overall effect, develop web pages that enrich the Internet, and strive to improve user experience through technology. This tutorial is provided with technical support and proofreading by @鱼Csubtitle group, welcome to comment and eat!)