Web developer, web development background development

Tag semantic ：

The difference between semantics and default styles ：

• The default styles are some of the common styles set by the browser tag Form of expression ;

• The main purpose of semantics is to let people intuitively understand the use and function of tags and attributes ;

The semantic function of tags ：

• When only HTML When the page is , No, CSS, We can still understand the page very clearly DOM structure

• Team maintenance , When the team comes review Code or refactoring , Improve the readability of the code , Easier to maintain

• advantageous to SEO, Search engine crawlers rely on tags to determine the context and the weight of each keyword

• Improve user experience , such as  title  and  alt  And so on to explain the content information

The real questions of interview in large factories are arranged

CSS：

1, The box model 2, How to center a box horizontally and vertically ？3,css  Priority determination 4, Explain the down float and how it works , Clear float method ？5,CSS Several ways to hide elements 6, How to realize the communication between multiple tabs in the browser ?7, Briefly CSS The element classification of 8,link @import  Import  css9, Draw a triangle

JavaScript：

1, Introduce JavaScript Basic data types for 2,jQuery Use advice 3, The difference between stack and heap ？4,Javascript Several ways to implement inheritance ？5,Javascript Several ways to create objects ？6, Javascript Scope 7, What is a closure （closure）, Why use it ？8, javascript  In code "use strict"; What does that mean?  ?  What's the difference between using it ？9, Deep copy and light copy 10,JS How to delay loading ？11, The difference between synchronous and asynchronous ?12,  What is cross domain problem  , How to solve cross domain problems ?13, How to do modular development ？14,DOM operation 15, Those operations can cause memory leaks 16, What is? Cookie  Isolation ？17, Responding to events 18,flash and js How to interact through what class ?19,JS Garbage collection mechanism ？20,promise  usage

Vue：

1, about MVVM The understanding of the ？2,Vue Life cycle of 3,Vue The principle of data bidirectional binding 4,Vue Parameter passing between components 5,Vue The routing implementation of ：hash Pattern   and  history Pattern 6,vue Hook function of routing 7, Excuse me,  v-if  and  v-show  What's the difference? ？9、 about Vue It's an understanding of a progressive framework 10、vue.js What are the two cores of ？11,vue Common modifiers 12,Vue  How to communicate between components ？13,vue The child component calls the method of the parent component 14, How to define vue-router Dynamic routing for ？ How to get the transmitted value ？15, Please introduce your understanding of vue-router The understanding of the ？16,vue-router Respond to changes in routing parameters 17,vuex What are the attributes ？

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