javascript - JQuery smooth animation -

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i have animation makes buttons on screen 'beat'. works fine exept 1 thing, animation 'sharp' , not smooth, how can smooth it?

function myfunction() {     setinterval(function () {         tstfnc();     }, 1000); }  var flag = true;  function tstfnc() {     var numm = math.floor((math.random() * 10) + 1);     var stringm = '#mgf_main' + numm + ' img';      $(stringm).animate({         width: '80px',         height: '80px'     }, 150, function () {         $(stringm).animate({             width: '68px',             height: '68px'         }, 150, function () {             // nothing         });     }); };

you can set easing property on animate options.

http://api.jquery.com/animate/

http://easings.net/


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