interview

Common questions for frontend developer.

HTML

• What is new in css and html
• display variants
• positiong
• css variables
• Buttton vs anchor
• Semantic tags

JS

• how browser works
• repaint and reflow
• Js gamechanger features from ES6.
• ES what is new for today.
• var, let, const
• JS types
• Symbols
• rest, spread
• function expretion vs function declaration
• arrow fn vs fn
• closures
• Objects
• Map, Set, Proxy
• Prototype inheritense vs OOP
• Prototypes vs proto
• Can you write your own 'instance of'
• Describe process of creating object by using function contructor and operator 'new'
• Promises
• Mikrotasks, makrotasks
• @@@ How js works(AST(abstract syntax tree), optimizator, JIT(just in time))
• Cashe in V8 and hidden classes js
• Write your own subscriber
• Task about optimiaztion of searching in 100k sorted items items
• Promises vs Observable
• Can we implement Promise.all in async/await style?
• CommonJS vs AMD

---------Browser behaviors and HTTP---------

• Describe flow of HTTP request
• CORS vs jsonp and why they needed
• What type of security vulnerability do you know
• How to increase performance

---------Team works---------

• How would you manege a new large project. What tools will you use?
• How you are planing your workflow?
• How you gonna structure your project?
• How would you control code quality on your project?

---------Vue---------

1. Reactivity
2. data vs computed vs watcher
3. Event propagation
4. slots
5. Vuex
6. nextTick
7. Provide, Inject

Hello

<script> export default { name: 'Hello', data: { value: 1 }, mounted() { for (i = 0; i < 100; i++ ) { this.value = this.value++; } } } </script>