tether/dist/js/tether.min.js

A client-side library to make absolutely positioned elements attach to elements in the page efficiently.

/*! tether 2.0.0 */

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o=t.left,i=t.top;return"auto"===o&&(o=T[e.left]),"auto"===i&&(i=P[e.top]),{left:o,top:i}}(this.targetAttachment,this.attachment);this.updateAttachClasses(this.attachment,o);var n=this.cache("element-bounds",(function(){return b(e.bodyElement,e.element)})),s=n.width,r=n.height;if(0!==s||0!==r||i(this.lastSize))this.lastSize={width:s,height:r};else{var a=this.lastSize;s=a.width,r=a.height}var h=this.cache("target-bounds",(function(){return e.getTargetBounds()})),l=h,p=M(_(this.attachment),{width:s,height:r}),d=M(_(o),l),u=M(this.offset,{width:s,height:r}),m=M(this.targetOffset,l);p=W(p,u),d=W(d,m);for(var g=h.left+d.left-p.left,v=h.top+d.top-p.top,w=0;w<L.modules.length;++w){var y=L.modules[w].position.call(this,{left:g,top:v,targetAttachment:o,targetPos:h,elementPos:n,offset:p,targetOffset:d,manualOffset:u,manualTargetOffset:m,scrollbarSize:E,attachment:this.attachment});if(!1===y)return!1;i(y)||"object"!=typeof y||(v=y.top,g=y.left)}var E,O={page:{top:v,left:g},viewport:{top:v-pageYOffset,bottom:pageYOffset-v-r+innerHeight,left:g-pageXOffset,right:pageXOffset-g-s+innerWidth}},x=this.target.ownerDocument,C=x.defaultView;if(C.innerHeight>x.documentElement.clientHeight&&(E=this.cache("scrollbar-size",c),O.viewport.bottom-=E.height),C.innerWidth>x.documentElement.clientWidth&&(E=this.cache("scrollbar-size",c),O.viewport.right-=E.width),-1!==["","static"].indexOf(x.body.style.position)&&-1!==["","static"].indexOf(x.body.parentElement.style.position)||(O.page.bottom=x.body.scrollHeight-v-r,O.page.right=x.body.scrollWidth-g-s),!i(this.options.optimizations)&&!1!==this.options.optimizations.moveElement&&i(this.targetModifier)){var A=this.cache("target-offsetparent",(function(){return F(e.target)})),z=this.cache("target-offsetparent-bounds",(function(){return b(e.bodyElement,A)})),Y=getComputedStyle(A),S=z,X={};if(["Top","Left","Bottom","Right"].forEach((function(t){X[t.toLowerCase()]=parseFloat(Y["border"+t+"Width"])})),z.right=x.body.scrollWidth-z.left-S.width+X.right,z.bottom=x.body.scrollHeight-z.top-S.height+X.bottom,O.page.top>=z.top+X.top&&O.page.bottom>=z.bottom&&O.page.left>=z.left+X.left&&O.page.right>=z.right){var H=A.scrollLeft,D=A.scrollTop;O.offset={top:O.page.top-z.top+D-X.top,left:O.page.left-z.left+H-X.left}}}return this.move(O),this.history.unshift(O),this.history.length>3&&this.history.pop(),t&&f(),!0}},g.move=function(t){var e=this;if(!i(this.element.parentNode)){var o,n,s,r={};for(var a in t)for(var h in r[a]={},t[a]){for(var f=!1,p=0;p<this.history.length;++p){var c=this.history[p];if(!(i(c[a])||(o=c[a][h],n=t[a][h],s=void 0,void 0===s&&(s=1),o+s>=n&&n>=o-s))){f=!0;break}}f||(r[a][h]=!0)}var u={top:"",left:"",right:"",bottom:""},m=function(t,o){var n,s;!1!==(!i(e.options.optimizations)?e.options.optimizations.gpu:null)?(t.top?(u.top=0,n=o.top):(u.bottom=0,n=-o.bottom),t.left?(u.left=0,s=o.left):(u.right=0,s=-o.right),"number"==typeof window.devicePixelRatio&&devicePixelRatio%1==0&&(s=Math.round(s*devicePixelRatio)/devicePixelRatio,n=Math.round(n*devicePixelRatio)/devicePixelRatio),u[D]="translateX("+s+"px) translateY("+n+"px)","msTransform"!==D&&(u[D]+=" translateZ(0)")):(t.top?u.top=o.top+"px":u.bottom=o.bottom+"px",t.left?u.left=o.left+"px":u.right=o.right+"px")},g=!0;!i(this.options.optimizations)&&!1===this.options.optimizations.allowPositionFixed&&(g=!1);var v,b,w=!1;if((r.page.top||r.page.bottom)&&(r.page.left||r.page.right))u.position="absolute",m(r.page,t.page);else if(g&&(r.viewport.top||r.viewport.bottom)&&(r.viewport.left||r.viewport.right))u.position="fixed",m(r.viewport,t.viewport);else if(!i(r.offset)&&r.offset.top&&r.offset.left){u.position="absolute";var y=this.cache("target-offsetparent",(function(){return F(e.target)}));F(this.element)!==y&&l((function(){e.element.parentNode.removeChild(e.element),y.appendChild(e.element)})),m(r.offset,t.offset),w=!0}else u.position="absolute",m({top:!0,left:!0},t.page);if(!w)if(this.options.bodyElement)this.element.parentNode!==this.options.bodyElement&&this.options.bodyElement.appendChild(this.element);else{for(var E=!0,O=this.element.parentNode;O&&1===O.nodeType&&"BODY"!==O.tagName&&(b=void 0,((b=(v=O).ownerDocument).fullscreenElement||b.webkitFullscreenElement||b.mozFullScreenElement||b.msFullscreenElement)!==v);){if("static"!==getComputedStyle(O).position){E=!1;break}O=O.parentNode}E||(this.element.parentNode.removeChild(this.element),this.element.ownerDocument.body.appendChild(this.element))}var x={},C=!1;for(var T in u){var P=u[T];this.element.style[T]!==P&&(C=!0,x[T]=P)}C&&l((function(){d(e.element.style,x),e.trigger("repositioned")}))}},g._addClasses=function(){var t=this.options,e=t.classes,o=t.classPrefix;n(this.element,s("element",e,o)),!1!==this.options.addTargetClasses&&n(this.target,s("target",e,o))},g._removeClasses=function(){var t=this,e=this.options,o=e.classes,i=e.classPrefix;r(this.element,s("element",o,i)),!1!==this.options.addTargetClasses&&r(this.target,s("target",o,i)),this.all.forEach((function(e){t.element.classList.remove(e),t.target.classList.remove(e)}))},m}(C);R.modules=[],L.position=B;var j=d(R,L);return j.modules.push({initialize:function(){var t=this,e=this.options,o=e.classes,i=e.classPrefix;this.markers={},["target","element"].forEach((function(e){var n=document.createElement("div");n.className=s(e+"-marker",o,i);var r=document.createElement("div");r.className=s("marker-dot",o,i),n.appendChild(r),t[e].appendChild(n),t.markers[e]={dot:r,el:n}}))},position:function(t){var e={element:t.manualOffset,target:t.manualTargetOffset};for(var i in e){var n=e[i];for(var s in n){var r,a=n[s];(!o(a)||-1===a.indexOf("%")&&-1===a.indexOf("px"))&&(a+="px"),this.markers[i]&&(null==(r=this.markers[i].dot)?void 0:r.style[s])!==a&&(this.markers[i].dot.style[s]=a)}}return!0}}),j}));
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