Есть такой progressbar.min
Вот его содержимое
// ProgressBar.js 0.9.0
// https://kimmobrunfeldt.github.io/progressbar.js
// License: MIT
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f=e.extend({},,g=e.extend({},this._opts);b=e.extend(g,;var h=this._easing(b.easing),i=this._resolveFromAndTo(a,h,f);this.stop(),this.path.getBoundingClientRect();var j=this._getComputedDashOffset(),k=this._progressToOffset(a),l=this;this._tweenable=new d,this._tweenable.tween({from:e.extend({offset:j},i.from),to:e.extend({offset:k},i.to),duration:b.duration,easing:h,step:function(a){l.path.style.strokeDashoffset=a.offset;var c=b.shape||l;b.step(a,c,b.attachment)},finish:function(a){e.isFunction(c)&&c()}})},g.prototype._getComputedDashOffset=function(){var a=window.getComputedStyle(this.path,null);return parseFloat(a.getPropertyValue("stroke-dashoffset"),10)},g.prototype._progressToOffset=function(a){var b=this.path.getTotalLength();return b-a*b},g.prototype._resolveFromAndTo=function(a,b,c){return c.from&&c.to?{from:c.from,to:c.to}:{from:this._calculateFrom(,to:this._calculateTo(a,}},g.prototype._calculateFrom=function(a){return 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b=this._trailString(a),c=e.extend({},a);return c.trailColor||(c.trailColor="#eee"),c.trailWidth||(c.trailWidth=c.strokeWidth),c.color=c.trailColor,c.strokeWidth=c.trailWidth,c.fill=null,this._createPathElement(b,c)},g.prototype._createPathElement=function(a,{var c=document.createElementNS("http://www.w3.org/2000/svg","path");return c.setAttribute("d",a),c.setAttribute("stroke",b.color),c.setAttribute("stroke-width",b.strokeWidth),b.fill?c.setAttribute("fill",b.fill):c.setAttribute("fill-opacity","0"),c},g.prototype._createTextElement=function(a,{var c=document.createElement("p");c.appendChild(document.createTextNode(a.text.value));var d=a.text.style;return d&&(b.style.position="relative",e.setStyles(c,d),d.color||(c.style.color=a.color)),c.className=a.text.className,this._initializeTextElement(a,b,c),c},g.prototype._initializeTextElement=function(a,b,c){},g.prototype._pathString=function(a){throw new Error("Override this function for each progress 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Но вообще не понимаю что тут надо искать....... Хотяб примерно подскажите что именно