Web-Essentials Reminder

This is a simple reminder to help refresh your knowledge or prepare for a Junior position interview.

JavaScript Engine

• 
  Data Types
  
  
  • 
    number: for any kind of numbers, integer or floating-point.
  
  
  • 
    string: for strings. A string may have one or more characters; there’s no separate single-character type.
  
  
  • 
    boolean: for true/false values.
  
  
  • 
    null: for unknown values – a standalone type with a single value null.
  
  
  • 
    undefined: for unassigned values – a standalone type with a single value undefined.
  
  
  • 
    object: for more complex data structures.
  
  
  • 
    symbol: for unique identifiers.
    
  
  
  • 
    Variables: const, let, and var.
    
  
  
  • 
    Closures: , ,
    
  
  
  • 
    Prototypes:
    
  
  
  • 
    Property flags and descriptors:
    
  
  
  • 
    Generators (yield):
    
  
  
  • 
    Memory allocation:
    
  
  
  • 
    Streams: ,
    
  
  
  • Pros and cons of Node.js
  
  
  • Express and other frameworks
  
  

  
  
  
  Browser
  

  
  
  
  • 
    Web APIs, JavaScript runtime, browser event loop, and browser promises:
    
  
  
  • Web Workers
  
  
  • Document Object Model (DOM)
  
  
  • 
    Virtual DOM:
    
  
  
  • 
    Shadow DOM: , Quora
    
  
  

  
  
  
  REST API
  

  
  
  
  • Overview
  
  
  • API design
  
  
  • Examples
  
  
  • Bulk operations
  
  

  
  
  
  Authentication and Authorization
  

  
  
  
  • Cookies
  
  
  • Session
  
  
  • LocalStorage
  
  
  • JWT
  
  
  • OAuth 2
  
  

  
  
  
  HTTPS
  

  
  
  
  • Protocol
  
  
  • Methods & Status codes
  
  
  • Limitations
  
  

  
  
  
  Testing
  

  
  
  
  • Behavior-Driven Development (BDD)
  
  
  • Test-Driven Development (TDD)
  
  

  
  
  
  Object-Oriented Programming (OOP)
  

  
  
  
  • Fundamentals
  
  
  • Examples
  
  
  • SOLID principles
  
  
  • Design patterns
  
  

  
  
  
  Build tools and preprocessors
  

  
  
  
  • Webpack
  
  
  • Sass
  
  
  • Less
  
  
  Vollständiger Original-Bericht

  Ausführliche Details, Code-Beispiele & Hersteller-Stellungnahme auf dev.to.

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