What skills do you need as a qualified web front-end engineer?

Well, as a qualifiedWhat skills does a web front-end engineer need to have?
　　 HTML5
　　 HTML is a Hypertext Markup language that is designed for "web page creation and other information that you can see in a Web browser."HTML5 is the latest language specification published by the World Wide Web and is openThe cornerstone of the Web network platform, so doWeb front end, proficientHTML5 is a skill that must be mastered.
　　 CSS3
　　 CSS is cascading style sheets.The use of cascading style sheets in web pages makes it possible to effectively control the layout, font, color, background and other effects of the page.Just make some simple changes to the corresponding code, you can change the different parts of the same page, or pages of different page appearance and format.CSS3 isThe updated version of CSS technology,CSS3 language development is developing in a modular direction. The previous specification was too large and complex to be a module, so it was broken down into smaller modules, and more new modules were added. These modules include:box model, List module, hyperlink mode, language modules, backgrounds, and borders, text effects, multi-column layouts, and more.CSS3 forThe design of the entire Web front-end page is an essential skill.
　　 Javascript
　　 JavaScript is a literal-translation scripting language, which is a dynamic type, a weak type, a prototype-based language, and a built-in support type. Its interpreter is calledJavaScript engine, a part of the browser, is widely used in the client's scripting language, which was firstHTML (an application under the standard Universal Markup Language) is used on a Web page to giveHTML Web pages Add dynamic features to provide users with smoother and more beautiful browsing results. Mastered theJavaScript, you can add a variety of dynamic effects to your Web page, such as shutter effects, ad switching effects, floating ad effects, up and down seamless scrolling effects and so on.
　　 Jquery
　　 JQuery, as its name implies,JavaScript and Queries(Query), which is an auxiliaryA library developed by JavaScript. It's lightweight.JS Library, it is compatible withCSS3, also compatible with various browsers (IE 6.0+, ff1.5+, Safari2.0+,opera 9.0+),JQuery2.0 and subsequent versions will no longer supportIE6/7/8 Browser.jquery makes it easier for users to handleHtmlEVENTS, animating, and providing easy access to the siteAjax interaction. Master of Skillsjquery will make it easier for you to useJavascript.
　　 Ajax
　　 Ajax is "Asynchronous Javascriptandxml "(AsynchronousJavaScript andXML) is a web development technique that creates an interactive Web application that updates a part of a webpage without reloading the entire page.Ajax developers must understand the traditionalMVC architecture, which limits the boundaries between application hierarchies. At the same time, developers need to considerExternal and use of C/s environmentAjax technology to re-stereotypeMVC boundaries. The most important thing is thatAjax developers must disallow the use of page collections as a way to considerWeb apps and need to think of them as a single page. OnceWhen the scope between UI design and service architecture is strictly differentiated, developers need to update and change the technology collection. Must be proficient in achieving web site interactionAjax.
　　 BootStrap
　　 Bootstrap, fromTwitter is currently a very popular front-end framework.Bootstrapis based onHtmlCssJavascript, it's simple and flexible, making web  development faster. It was developed by twitter designer mark Otto and jacob Thornton, is a css/html frame. bootstrap provides an elegant html and css specification, which is the dynamic less written. bootstrap is popular after the launch, has been github on the popular open source projects, including nasa MSNBC (Microsoft National Broadcasting Corporation) breaking News all used the project. Some domestic mobile developers more familiar with the framework, such as wex5 front-end open source framework, but also based on bootstrap Source for performance optimization. bootstrap contains a rich web components, which can be used to quickly build a beautiful, full-featured website. These include the following components: drop-down menus, button groups, button drop-down menus, navigation, navigation bars, path navigation, pagination, typography, thumbnails, warning dialogs, progress bars, media objects, and more. Always learn the latest front-end framework is also web front-end engineers have the necessary skills Oh!

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What skills do you need as a qualified web front-end engineer?