Front-end technology,

Front-end technology,
Js: 1. prototype and prototype chain 2. closure 3. es6 has knowledge, and es6 4. and amd的5.5.html rendering processes (parse html and build dom tree, rendering tree (renderobject, renderlayer), layout (render), graph (panit) 6. do you know about the rendering engine of the browser or webkit (renderlayer of the dom tree rendering tree renderobject rendering layer) css: 1. what about the standard CSS box model? What are the differences between the box models of earlier IE versions? (1) There are two types: IE box model and W3C box model. (2) Box Model: content, padding, and margin), border (border); (3) Partition: The content part of IE calculates the border and padding; 2. flex3.h5 page how to restore fidelity introduces some processing scheme framework: 1. vue. js understanding and vue. js features (vue. js bidirectional binding principle and design mode) 2. vue. which plug-ins (vuex vue-router) are used for js applications in the project? 3. jquery familiarity and features, jquery and vue. js differences 4. jquery delegation 5. learn more about other frameworks (react angularjs) 6. about the front-end of dom optimization diff algorithm: 1. cache (+ server-side cache etag) 2. cross-origin (jsonp ....) 3. merge request implementation 4. http, https, and http2.0 Features 5. chat Room websocket and alternative solution (+ eventsource) 6. common Front-end design modes (Observer mode, Singleton, factory, strategy, decoration) 7. knowledge about webpack packaging and Its Features 8. front-end security protection 7. implement a method to determine whether an input positive integer (for example, 4 8 18) is a square of 2, returns true or false (for example, if 4 is the 2nd power of 2 and 8 is the 2nd power of 18, it is not) common attack methods (xss) Applications: 1. problems encountered at work 2. what is the most difficult task?