When is a function execution context destroyed?
When the function returns. Its frame is popped from the call stack and its local variables become eligible for garbage collection unless captured by a closure.
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More FAQs in Global Execution Context vs Function Execution Context
The global context is created once at program start and lives until the program ends. A function context is created every time a function is called and is destroyed when it returns.
Exactly one per program. It sits at the bottom of the call stack for the entire lifetime of the script.
In a browser, this points to the window object. In Node.js modules, this points to module.exports (or globalThis in modern code).
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