javascript - How to use inline easing with ScrollTo plug-in -

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i try use scrollto plug-in easing effect.

and don't want include easing plug-in file, because use once , 1 easing effect.

this 'easeoutback' want use :

easeoutback: function (x, t, b, c, d, s) {         if (s == undefined) s = 1.70158;         return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b; }

and scrollto's function code like..

$(window).scrollto(element,800,{offset:-80,onafter:function(){             alert('done'); }});

so try insert easing effect like...

$(window).scrollto(element,800,{offset:-80, easing:function(x, t, b, c, d){     return -c/2 * (math.cos(math.pi*t/d) - 1) + b; }, onafter:function(){     alert('done'); }});

it dosn't work.

typeerror: b.easing[this.easing] not function

you can store easing function in $.easing:

$.easing.easeoutback = function(x, t, b, c, d, s) {     if(s == undefined) s = 1.70158;     return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b; };

after can use when easing plugin loaded.

passing function directly doesn't work because jquery's animate() accepts string easing function (which looked in $.easing).


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