What is the output of the following? “`js const target = { a: 1 }; const handler = { set(obj, prop, value) { obj[prop] = value * 2; return true; } }; const p = new Proxy(target, handler); p.b = 5; console.log(target.b); “`

Question

JavaScript Developer — Hard

What is the output of the following? “`js const target = { a: 1 }; const handler = { set(obj, prop, value) { obj[prop] = value * 2; return true; } }; const p = new Proxy(target, handler); p.b = 5; console.log(target.b); “`

Accepted Answer

The output is 10. When setting the property `b` on the proxy `p`, the handler function multiplies the value by 2 before assigning it to the target object. Therefore, `target.b` will be 10.