javascript - Closure counter inside setInterval

Question

I have a function:

setInterval(function () {
        var counter = 0;
        (function() {
          counter = counter + 1;
          console.log(counter);
          })(counter)
       }, 1000)

Answer 1

You could use a function which returns a function as closure over counter.

setInterval(function(counter) {
    return function() {
        console.log(++counter);
    };
}(0), 1000);