Linked Questions

Popular Questions

clearTimeout if exists

Asked by At

timer_gear exist only in case if I press some button (until 5 sec). But there is another function it can be called any time. In this function I clear the timer and restart it. But first I have to check if the object exists otherwise I get this error: Uncaught ReferenceError: timer_gear is not defined

Could you help me to solve this? These does not work.

if(timer_gear!="undefined")clearTimeout(timer_gear);

if(timer_gear)clearTimeout(timer_gear);

EDIT1: first I misspelled my question: if(!timer => if(timer EDIT2:

the full code is:

function hide_gear(){
    $('#gear_div').animate({opacity: 0}, 1000);
    delete timer_gear; //EDIT3: destroy object
}

...

/*gear*/
$('#gear').click(function(){
    $('#gear_div').animate({
        opacity: 1,
      }, 1000, function() {
        timer_gear = setTimeout("hide_gear();",5000);
      });
});
$('#gear').mousemove(function(){
    if( ? ? ? )
    {
        clearTimeout(timer_gear);
        timer_gear = setTimeout("hide_gear();",5000);
    }

});

Results:

timer_gear// Uncaught ReferenceError timer_gear is not defined
timer_gear != undefined // Uncaught ReferenceError: timer_gear is not defined
typeof timer_gear !== "undefined" // WORKS
typeof timer_gear != "undefined" // WORKS, just tired it
var timer_gear; //at the begining - WORKS, but I did not wanted a new variable if its not necessary

thank you for answers!

Related Questions