js timer

js can use two timers, one is setInterval (function(){}, time); the other is setTimeout (function(){}, time);

The difference between the two is that setInterval is not set after time milliseconds. Execute a function once, settimeout is to execute the function after time milliseconds,

I encountered a problem here,

Js code

function startFlushTime(min){  
    var sec = min*60 ;  
    var time = timeFormat(sec) ;  
    $("#time").html(time);  
    setInterval(doflush(), 1000);  
}  
function doflush(){  
    debugger  
    var time = $("#time").html();  
    if(time && time!=''){  
        var res = timeFormat(timeParse(time)-1)  
        $("#time").html(res);  
    }  
}

will not execute the scheduled task after writing it like this, change it to

Js code

function startFlushTime(min){  
    var sec = min*60 ;  
    var time = timeFormat(sec) ;  
    $("#time").html(time);  
    setInterval(function(){doflush();}, 1000);  
}  
function doflush(){  
    debugger  
    var time = $("#time").html();  
    if(time && time!=''){  
        var res = timeFormat(timeParse(time)-1)  
        $("#time").html(res);  
    }  
}

and succeed, that is, setinterval Then create a new function and execute the methods that need to be executed in it