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Element から CSS Selector を取得する
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/** | |
* Element から CSS Selector を取得する | |
* @author toshi (https://github.com/k08045kk) | |
* @license MIT License | https://opensource.org/licenses/MIT | |
* @version 1 | |
* @since 1 - 20230211 - 初版 | |
* @see https://www.bugbugnow.net/2023/02/get-css-selector.html | |
* @see https://gist.github.com/k08045kk/d239bec86ae9b06c438e7e2bf67575fb | |
* @param {Element} element - 要素 | |
* @return {string} - CSS Selector | |
*/ | |
var getCSSSelector = function(element) { | |
if (!(element && element instanceof Node) | |
|| !(element.nodeType === Node.ELEMENT_NODE || (element=element.parentElement))) { | |
return 'unknown'; | |
} | |
var array = []; | |
for (; element; element=element.parentElement) { | |
if (element.id) { | |
// #id | |
array.unshift('#'+element.id) | |
break; | |
} else { | |
// tagName.className:nth-of-type(n) | |
var tagName = element.tagName; | |
var text = tagName.toLowerCase(); | |
var list = element.classList; | |
var len = list.length; | |
for (var i=0; i<len; i++) { text += '.'+list[i]; } | |
var n = 0; | |
for (var pre=element; (pre=pre.previousElementSibling) && (pre.tagName != tagName || ++n); ) {} | |
var nth = n+1; | |
if (!n) { | |
for (var next=element; (next=next.nextElementSibling) && (next.tagName != tagName || !++n); ) {} | |
} | |
if (n) { | |
text += ':nth-of-type('+nth+')'; | |
} | |
array.unshift(text); | |
} | |
} | |
return array.join(' > '); | |
}; |
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