subscript

import jessie from 'subscript/jessie.js' // Jessie is a JavaScript subset supporting statements, functions, and control flow. // It's ideal for safely evaluating user-defined logic or custom DSLs. let expression = ` function calculateFactorial(n) { if (n <= 1) return 1; return n * calculateFactorial(n - 1); } let result = calculateFactorial(process.env.FACTORIAL_NUMBER ? parseInt(process.env.FACTORIAL_NUMBER) : 5); result; `; // Compile the expression into an executable function. // The function takes a context object for variables and methods. let compiledFn = jessie(expression); // Execute the compiled function with a context. // Here, we're demonstrating a simple `process.env` access for dynamic input. // If process.env.FACTORIAL_NUMBER is '7', it will calculate factorial of 7. const context = {}; // Jessie expressions have no access to global scope by default. const result = compiledFn(context); console.log(`The factorial result is: ${result}`); // Expected output if FACTORIAL_NUMBER is 5: The factorial result is: 120