javascript 保存自https://classroom.udacity.com/nanodegrees/nd001/parts/4942f4d7-a48d-4794-9eb0-404b3ed3

Posted 2021-05-03

function remember(number) {
    return function() {
        return number;
    }
}

const returnedFunction = remember(5);

console.log( returnedFunction() );
// 5


//When a function is declared, it locks onto the scope chain. You might think this is pretty straightforward since we just looked at that in the previous section. What's really interesting about a function, though, is that it will retain this scope chain -- even if it is invoked in a location other than where it was declared. This is all due to the closure!