Function createProxy

createProxy<T extends object>(target: T, handler: ProxyHandler<T>): T

Creates a proxy object that can intercept operations on a target object

Type Parameters

T extends object
Type of object to proxy (must be an object)

Parameters

target: T
Object to proxy
handler: ProxyHandler<T>
Object containing proxy trap functions

Returns T

A proxy wrapping the target object

Example: Virtual Properties

const person = { firstName: "John", lastName: "Doe" };
const withFullName = createProxy(person, {
    get: (obj, key) => {
        if (key === "fullName") {
            return `${obj.firstName} ${obj.lastName}`;
        }
        return obj[key];
    }
});

print(withFullName.fullName); // "John Doe"

Example: Validation

const numbers = createProxy([] as number[], {
    set: (obj, key, value) => {
        if (typeof value !== "number") {
            error("Only numbers allowed!");
        }
        obj[key] = value;
    }
});

numbers.push(42); // OK
numbers.push("not a number"); // Throws error