增量jQuery val（）无法正常工作

Question

I have a function myTimer() which makes a counter. I want to increment input value when user clicks next button and repeat counter. The problem is every time it puts a new value of (rem) in input but I want to increase it by new rem. dur is a variable declared in myTimer() it's user entered to make count, and seconds the variable counted, it's declared in myTimer() too.

  $(document).ready(function(){
       var rem= 0;            
        $("#next").click(function(){
            rem+= dur-seconds-1;
           $("input#time").val(rem);

             myTimer();
       });
});

Answer 1

You have declared JS variable var rem= 0; inside document.ready.

Declare it globally, before $(document).ready()