text: !function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).Ukiyo=e()}(this,(function(){"use strict";var t=function(t,e){var i=this;if(void 0===e&&(e={}),t&&(s="undefined"!=typeof Promise&&-1!==Promise.toString().indexOf("[native code]"),n=Element.prototype.closest,s&&n&&"IntersectionObserver"in window)){var s,n;this.element=t,this.wrapper=document.createElement("div"),this.isIMGtag="img"===t.tagName.toLowerCase(),this.overflow=null,this.timer=null,this.resizeEvent=this.resize.bind(this),this.observer=null,this.requestId=null,this.isInit=!1;this.options=Object.assign({},{scale:1.5,speed:1.5,wrapperClass:null,willChange:!1},e);var r,o=t.getAttribute("data-u-scale"),l=t.getAttribute("data-u-speed"),h=t.getAttribute("data-u-willchange");if(null!==o&&(this.options.scale=o),null!==l&&(this.options.speed=l),null!==h&&(this.options.willChange=!0),this.isIMGtag){var a=this.element.getAttribute("src");(r=a,new Promise((function(t,e){var i=new Image;i.onload=function(){return t(i)},i.onerror=function(t){return e(t)},i.src=r}))).then((function(){i._init()}))}else this._init()}};return t.prototype._init=function(){this.isInit||(this._setupElements(),this._observer(),this._addEvent(),this.isInit=!0)},t.prototype._setupElements=function(){this._setStyles(!0);var t=this.element.getAttribute("data-u-wrapper-class"),e=this.element.closest("picture");if(this.options.wrapperClass||t){var i=t||this.options.wrapperClass;this.wrapper.classList.add(i)}null!==e?(e.parentNode.insertBefore(this.wrapper,e),this.wrapper.appendChild(e)):(this.element.parentNode.insertBefore(this.wrapper,this.element),this.wrapper.appendChild(this.element))},t.prototype._setStyles=function(t){var e=this.element.clientHeight,i=this.element.clientWidth,s=document.defaultView.getComputedStyle(this.element),n="absolute"===s.position;this.overflow=e-e*this.options.scale,"absolute"===s.position&&"0px"!==s.marginRight&&"0px"!==s.marginLeft&&s.marginLeft===s.marginRight&&(this.wrapper.style.margin="auto"),"0px"===s.marginTop&&"0px"===s.marginBottom||(this.wrapper.style.marginTop=s.marginTop,this.wrapper.style.marginBottom=s.marginBottom,this.element.style.marginTop="0",this.element.style.marginBottom="0"),"auto"!==s.inset&&(this.wrapper.style.top=s.top,this.wrapper.style.right=s.right,this.wrapper.style.bottom=s.bottom,this.wrapper.style.left=s.left,this.element.style.top="0",this.element.style.right="0",this.element.style.bottom="0",this.element.style.left="0"),"none"!==s.transform&&(this.wrapper.style.transform=s.transform),"auto"!==s.zIndex&&(this.wrapper.style.zIndex=s.zIndex),this.wrapper.style.position=n?"absolute":"relative",t&&(this.wrapper.style.width="100%",this.wrapper.style.overflow="hidden",this.element.style.display="block",this.element.style.overflow="hidden",this.element.style.backfaceVisibility="hidden","0px"!==s.padding&&(this.element.style.padding="0"),this.isIMGtag?this.element.style.objectFit="cover":this.element.style.backgroundPosition="center"),n&&(this.wrapper.style.width=i+"px",this.element.style.width="100%"),"none"!==s.maxHeight&&(this.wrapper.style.maxHeight=s.maxHeight,this.element.style.maxHeight="none"),"0px"!==s.minHeight&&(this.wrapper.style.minHeight=s.minHeight,this.element.style.minHeight="none"),this.wrapper.style.height=e+"px",this.element.style.height=e*this.options.scale+"px"},t.prototype._observer=function(){this.observer=new IntersectionObserver(this._observerCallback.bind(this),{root:null,rootMargin:"0px",threshold:0}),this.observer.observe(this.wrapper)},t.prototype._observerCallback=function(t){var e=this;t.forEach((function(t){t.isIntersecting?(e.isVisible=!0,e._update()):(e.isVisible=!1,e._cancel())}))},t.prototype._update=function(){this._setPosition(),this.requestId=window.requestAnimationFrame(this._update.bind(this))},t.prototype._setPosition=function(){this.options.willChange&&"transform"!==this.element.style.willChange&&(this.element.style.willChange="transform"),this.element.style.transform="translate3d(0 , "+this._getTranslate()+"px , 0)"},t.prototype._getTranslate=function(){var t=Math.abs(this.overflow),e=this._getProgress()/100,i=this.overflow+t*e*this.options.speed;return Math.round(i)},t.prototype._getProgress=function(){var t=window.innerHeight,e=this.wrapper.offsetHeight,i=window.pageYOffset||document.documentElement.scrollTop||document.body.scrollTop||0,s=(i+t-(this.wrapper.getBoundingClientRect().top+i))/((t+e)/100);return Math.min(100,Math.max(0,s))},t.prototype._cancel=function(){this.requestId&&(this.options.willChange&&(this.element.style.willChange="auto"),window.cancelAnimationFrame(this.requestId))},t.prototype._addEvent=function(){navigator.userAgent.match(/(iPhone|iPad|iPod|Android)/)?window.addEventListener("orientationchange",this.resizeEvent):window.addEventListener("resize",this.resizeEvent)},t.prototype.resize=function(){clearTimeout(this.timer),this.timer=setTimeout(this.reset.bind(this),450)},t.prototype.reset=function(){this.wrapper.style.height="100%",this.wrapper.style.width="",this.wrapper.style.position="",this.element.style.height="",this.element.style.width="","0px"!==this.wrapper.style.margin&&(this.wrapper.style.margin="",this.element.style.margin=""),"auto"!==this.wrapper.style.inset&&(this.wrapper.style.top="",this.wrapper.style.right="",this.wrapper.style.bottom="",this.wrapper.style.left="",this.element.style.top="",this.element.style.right="",this.element.style.bottom="",this.element.style.left=""),"none"!==this.wrapper.style.transform&&(this.wrapper.style.transform="",this.element.style.transform=""),"auto"!==this.wrapper.style.zIndex&&(this.wrapper.style.zIndex=""),this._setStyles(),this._setPosition()},t.prototype.destroy=function(){var t;this._cancel(),this.observer.disconnect(),this.wrapper.removeAttribute("style"),this.element.removeAttribute("style"),(t=this.wrapper).replaceWith.apply(t,this.wrapper.childNodes),window.removeEventListener("resize",this.resizeEvent),window.removeEventListener("orientationchange",this.resizeEvent),this.isInit=!1},t}));
  