How Can I Retrieve Local Variables from a JavaScript Function\'s Scope?

Retrieving All Variables in Scope in JavaScript

While the conventional answer to the question of obtaining all variables within the current scope in JavaScript is negative, there exists a limited technique for retrieving local variables of a specific function.

To achieve this, convert the target function into a string using the toString() method. Parse the function's source code with a parser such as Esprima and locate objects with the "VariableDeclaration" type within the parsed result. These objects represent the local variable declarations in the function.

Note that this method only grants access to local variables defined directly within the function under investigation. It does not provide access to variables declared in enclosing scopes. Additionally, this approach relies on analyzing the function's source code, which may not always be available.

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