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JS under the hood

Sponsored · Ship Features Fearlessly Turn features on and off without deploys. Used by thousands of Ruby developers. →
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August 29, 2015
Technology
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JS under the hood

Just a description of how JS works

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dimko1

August 29, 2015
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Transcript

  1. JS under the hood

  2. Why? There is two types of developers who have no

    clue how their tools works: iOS devs and JS devs
  3. None
  4. None

  5. Object

  6. WTF IS OBJECT? An Object is a collection of properties.

    Each property is either a named data property, a named accessor property, or an internal property

  7. [[Prototype]]

  8. None

  9. Prototype Chain

  10. None

  11. this

  12. constructor

  13. None

  14. execution context

  15. Compiler Theory

  16. Steps • Tokenizing / Lexing • Parsing • Code-Generation

  17. Cast • Engine • Compiler • Scope

  18. LHS&RHS

  19. Scopes • Block Scope • Lexical Scope • Dynamic Scope(Runtime

    scope augmentation)

  20. rebinding /mutation

  21. None

  22. environment

  23. activation record model

  24. None
  25. None

  26. first-class functions

  27. free variable

  28. closure

  29. funArg problem upward/downward

  30. type casting

  31. coersion

  32. None
  33. None

  34. ?