The JavaScript Interpreter, Interpreted

on YouTube ↗19m

" summary

Explains that JavaScript creates a runtime execution context (three kinds: global, function, eval) then turns activation records into a variable object with parameters, hoisted functions and undefined variables so hoisting is real and block scope is absent only function or global scope exists not block scope, notes V8 may compile to machine code instead of interpreting, shows closures as inner functions retaining parent variable objects, and demos an esprima rewrite that exposes scopes and works.

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" chapters (15)

1. 0:00Introduction
2. 0:49Managing Complexity
3. 2:18Functions
4. 3:11Conclusion
5. 3:58Execution Context
6. 4:19Execution Contexts
7. 4:48Function Execution Context
8. 5:25Executing Context
9. 6:06Visualizing Execution Context
10. 6:33Execution Context Creation
11. 7:40Variable Instantiation
12. 9:34Variable Value
13. 10:00Scope
14. 11:41Closure
15. 12:50Questions

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