Front-end development engineer is the abbreviation of Web front-end development engineer, which has only been paid attention to in recent five years. Web front-end development technology is a process from easy to difficult, which mainly includes three elements: HTML (an application under standard generalized markup language), cascading style sheets and JavaScript. A good web requires front-end development engineers not only to master the basic knowledge of Web front-end development technology, website performance optimization, SEO and server-side, but also to learn to use various tools for auxiliary development and theoretical knowledge, including code maintainability, component ease of use, hierarchical semantic templates and browser hierarchical support.