datalist-polyfill.min.js

/*
* datalist-polyfill.js - https://github.com/mfranzke/datalist-polyfill
* @license Copyright(c) 2017 by Maximilian Franzke
* Supported by Christian, Johannes, @ailintom, @Kravimir, Michael and @hryamzik - many thanks for that !
*/
!function(){"use strict";if(!("list"in document.createElement("input"))||(!document.createElement("datalist")||!window.HTMLDataListElement)){!function(e){e&&e.prototype&&void 0===e.prototype.list&&Object.defineProperty(e.prototype,"list",{get:function(){if("object"==typeof this&&this instanceof e){var t=this.getAttribute("list");return document.getElementById(t)}return null}})}(window.HTMLInputElement),function(e){e&&e.prototype&&void 0===e.prototype.options&&Object.defineProperty(e.prototype,"options",{get:function(){if("object"==typeof this&&this instanceof e)return this.getElementsByTagName("option")}})}(window.HTMLElement);var e=!1,t=13,i=27,r=38,n=40,a=["text","email","number","search","tel","url"];window.addEventListener("touchstart",function t(){e=!0,window.removeEventListener("touchstart",t)});var o=function(t){var i=t.target,r=i.tagName.toLowerCase();if(r&&"input"===r&&i.getAttribute("list")){var n=i.getAttribute("list"),a=document.getElementById(n);if(null!==a){var o=a.getElementsByClassName("polyfilling")[0];if(void 0!==o){if(27===t.keyCode)return o.setAttributeNode(document.createAttribute("hidden")),void o.setAttribute("aria-hidden","true");var l=a.querySelectorAll("option:not([disabled]):not(.message)"),s=i.value,d=document.createDocumentFragment(),u=document.createDocumentFragment(),c=!1,p="email"===i.type&&i.multiple,m=38===t.keyCode||40===t.keyCode;if(p){var b=s.split(","),g=b.length-1;s=b[g].trim()}if(""!==s||m){Array.prototype.slice.call(l).sort(function(e,t){return e.value.localeCompare(t.value)}).forEach(function(e){var t=e.value;if(""!==t&&-1!==t.toLowerCase().indexOf(s.toLowerCase())&&!1===e.disabled){var i=e.label,r=" / ",n=i.substr(0,t.length+" / ".length),a=t+" / ";i&&i!==t&&n!==a?(e.innerText=t+" / "+i,e.setAttribute("data-label",e.getAttribute("label")),e.removeAttribute("label")):e.innerText.trim()||(e.innerText=t),d.appendChild(e),c=!0}else u.appendChild(e)}),o.appendChild(d);var y=o.options.length,f=0,v=y-1;if(o.size=y>10?10:y,o.multiple=!e&&y<2,e)o.selectedIndex=0;else if(-1===o.selectedIndex)switch(t.keyCode){case 38:o.selectedIndex=v;break;case 40:o.selectedIndex=0;break}(a.getElementsByClassName("ie9_fix")[0]||a).appendChild(u)}c?o.removeAttribute("hidden"):o.setAttributeNode(document.createAttribute("hidden")),o.setAttribute("aria-hidden",(!c).toString()),m&&o.focus()}}}},l=function(t){var i=t.target,r=i.tagName.toLowerCase(),n=i.type,d=window.getComputedStyle(i);if(r&&"input"===r&&i.getAttribute("list")&&a.indexOf(n)>-1){var u=t.type,c=i.getAttribute("list"),p=document.getElementById(c);if(null!==p){var m=p.getElementsByClassName("polyfilling")[0],b="focus"===u&&""!==t.target.value||t.relatedTarget&&t.relatedTarget===m,g=p.title;if(void 0===m){var y=i.getClientRects(),f=parseFloat(d.getPropertyValue("margin-right")),v=parseFloat(d.getPropertyValue("margin-left"));if(m=document.createElement("select"),m.setAttribute("class","polyfilling"),m.setAttributeNode(document.createAttribute("hidden")),m.style.position="absolute",m.setAttribute("aria-hidden","true"),m.setAttribute("aria-live","polite"),m.setAttribute("role","listbox"),e||m.setAttribute("aria-multiselectable","false"),"block"===d.getPropertyValue("display")?m.style.marginTop="-"+d.getPropertyValue("margin-bottom"):("rtl"===d.getPropertyValue("direction")?m.style.marginRight="-"+(y[0].width+v)+"px":m.style.marginLeft="-"+(y[0].width+f)+"px",m.style.marginTop=y[0].height+"px"),m.style.borderRadius=d.getPropertyValue("border-radius"),m.style.minWidth=y[0].width+"px",e){var h=document.createElement("option");h.innerText=g,h.disabled=!0,h.setAttribute("class","message"),m.appendChild(h)}p.appendChild(m),e?m.addEventListener("change",s):m.addEventListener("click",s),m.addEventListener("blur",s),m.addEventListener("keyup",s),i.setAttribute("autocomplete","off"),i.setAttribute("role","textbox"),i.setAttribute("aria-haspopup","true"),i.setAttribute("aria-autocomplete","list"),i.setAttribute("aria-owns",c)}switch(b?m.removeAttribute("hidden"):m.setAttributeNode(document.createAttribute("hidden")),m.setAttribute("aria-hidden",(!b).toString()),u){case"focus":i.addEventListener("keyup",o),i.addEventListener("focusOut",l,!0);break;case"blur":i.removeEventListener("keyup",o),i.removeEventListener("focusOut",l,!0);break}}}},s=function(e){var t=e.target,i=t.tagName.toLowerCase();if(i&&("select"===i||"option"===i)){var r="select"===i?t:t.parentNode,n=r.parentNode,a=n.title,o=e.type,l="keyup"===o&&13!==e.keyCode&&27!==e.keyCode;if("change"===o||"click"===o||"keyup"===o&&13===e.keyCode){var s=n.id,d=document.querySelector('input[list="'+s+'"]'),u=r.value;if(null!==d&&void 0!==u&&u.length>0&&u!==a){var c=d.value,p;"email"===d.type&&d.multiple&&(p=c.lastIndexOf(","))>-1?d.value=c.slice(0,p)+","+u:d.value=u,l=!1}}l?r.removeAttribute("hidden"):r.setAttributeNode(document.createAttribute("hidden")),r.setAttribute("aria-hidden",(!l).toString())}};document.addEventListener("focus",l,!0)}}();