JavaScriptで動的関数生成！Functionコンストラクタの使い方

const func = new Function(arg1, arg2, ..., functionBody);

const sum = new Function('a', 'b', 'return a + b');
console.log(sum(2, 3)); // 出力: 5

function createMathFunction(operator) {
    return new Function('x', 'y', `return x ${operator} y`);
}

const multiply = createMathFunction('*');
console.log(multiply(4, 5)); // 出力: 20

const variable = 'message';
const greet = new Function(variable, 'console.log("Hello, " + message)');
greet('World'); // 出力: Hello, World

const x = 10;
const func = new Function('return x');
// ReferenceError: x is not defined

// APIコールの例
const createApiCall = (endpoint) => {
    return new Function('data', `
        return fetch('${endpoint}', {
            method: 'POST',
            body: JSON.stringify(data)
        });
    `);
};