javascript - Problems with keydown events - control with setInterval -


if call without onkeydown function, works correctly. need run function -->only while spacebar pressed<--, , when left out finger of space bar, clearrect inside canvas.

that's function want control ->

function disparo(){  var forcax = 150; var movix = 846;  document.onkeydown = function(event) { event = window.event;  var e = event.keycode;  if (e==32){ fill = setinterval(function(){  ctx.fillrect(forcax, 546, 1, 28);  if(forcax < movix){     ctx.fillstyle = "#373dff";     forcax += 1; }  if(forcax > movix) {     forcax -= 1; }  if(forcax == movix){     movix = 150;     ctx.fillstyle = "#151515"; } if(forcax == 151){      movix = 846; }  }, 8);   }  }  }


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