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5 lines
3.4 KiB
JavaScript
5 lines
3.4 KiB
JavaScript
/*
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Details Element Polyfill 2.3.1
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Copyright © 2019 Javan Makhmali
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*/
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!function(){"use strict";var t=document.createElement("details");t.innerHTML="<summary>a</summary>b",t.setAttribute("style","position: absolute; left: -9999px");var e="open"in t&&function(){(document.body||document.documentElement).appendChild(t);var e=t.offsetHeight;t.open=!0;var n=t.offsetHeight;return t.parentNode.removeChild(t),e!=n}(),n="ontoggle"in t;var r,i,o,a,u='\ndetails, summary {\n display: block;\n}\ndetails:not([open]) > *:not(summary) {\n display: none;\n}\nsummary::before {\n content: "►";\n padding-right: 0.3rem;\n font-size: 0.6rem;\n cursor: default;\n}\n[open] > summary::before {\n content: "▼";\n}\n',s=[],c=s.forEach,d=s.slice;function m(t){(function(t,e){return(t.tagName==e?[t]:[]).concat("function"==typeof t.getElementsByTagName?d.call(t.getElementsByTagName(e)):[])})(t,"SUMMARY").forEach(function(t){var e=b(t,"DETAILS");t.setAttribute("aria-expanded",e.hasAttribute("open")),t.hasAttribute("tabindex")||t.setAttribute("tabindex","0"),t.hasAttribute("role")||t.setAttribute("role","button")})}function l(t){return!(t.defaultPrevented||t.ctrlKey||t.metaKey||t.shiftKey||t.target.isContentEditable)}function f(t){addEventListener("click",function(e){if(l(e)&&e.which<=1){var n=b(e.target,"SUMMARY");n&&n.parentNode&&"DETAILS"==n.parentNode.tagName&&t(n.parentNode)}},!1),addEventListener("keydown",function(e){if(l(e)&&(13==e.keyCode||32==e.keyCode)){var n=b(e.target,"SUMMARY");n&&n.parentNode&&"DETAILS"==n.parentNode.tagName&&(t(n.parentNode),e.preventDefault())}},!1)}function p(t){var e=document.createEvent("Event");e.initEvent("toggle",!1,!1),t.dispatchEvent(e)}function b(t,e){if("function"==typeof t.closest)return t.closest(e);for(;t;){if(t.tagName==e)return t;t=t.parentNode}}e||(document.head.insertAdjacentHTML("afterbegin","<style>"+u+"</style>"),r=document.createElement("details").constructor.prototype,i=r.setAttribute,o=r.removeAttribute,a=Object.getOwnPropertyDescriptor(r,"open"),Object.defineProperties(r,{open:{get:function(){return"DETAILS"==this.tagName?this.hasAttribute("open"):a&&a.get?a.get.call(this):void 0},set:function(t){return"DETAILS"==this.tagName?t?this.setAttribute("open",""):this.removeAttribute("open"):a&&a.set?a.set.call(this,t):void 0}},setAttribute:{value:function(t,e){var n=this,r=function(){return i.call(n,t,e)};if("open"==t&&"DETAILS"==this.tagName){var o=this.hasAttribute("open"),a=r();if(!o){var u=this.querySelector("summary");u&&u.setAttribute("aria-expanded",!0),p(this)}return a}return r()}},removeAttribute:{value:function(t){var e=this,n=function(){return o.call(e,t)};if("open"==t&&"DETAILS"==this.tagName){var r=this.hasAttribute("open"),i=n();if(r){var a=this.querySelector("summary");a&&a.setAttribute("aria-expanded",!1),p(this)}return i}return n()}}}),f(function(t){t.hasAttribute("open")?t.removeAttribute("open"):t.setAttribute("open","")}),m(document),window.MutationObserver?new MutationObserver(function(t){c.call(t,function(t){c.call(t.addedNodes,m)})}).observe(document.documentElement,{subtree:!0,childList:!0}):document.addEventListener("DOMNodeInserted",function(t){m(t.target)})),e&&!n&&(window.MutationObserver?new MutationObserver(function(t){c.call(t,function(t){var e=t.target,n=t.attributeName;"DETAILS"==e.tagName&&"open"==n&&p(e)})}).observe(document.documentElement,{attributes:!0,subtree:!0}):f(function(t){var e=t.getAttribute("open");setTimeout(function(){var n=t.getAttribute("open");e!=n&&p(t)},1)}))}();
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