it's part of Chrome Lighthouse test, but this is separated
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'use strict'; | |
function lighthouseDomTest ( /** @type {Element} */ rootElement ) | |
{ | |
let maxDepth = 0; | |
let maxDepthElement = null; | |
let mostChildren = 0; | |
let mostChildrenElement = null; | |
let allElements = rootElement.querySelectorAll( '*' ); | |
allElements.forEach( ( element ) => | |
{ | |
let currentElement = element; | |
if ( !currentElement.children.length ) { | |
let steps = 0; | |
while ( currentElement !== rootElement ) { | |
steps++; | |
currentElement = currentElement.parentElement; | |
} | |
if ( maxDepth < steps ) { | |
maxDepth = steps; | |
maxDepthElement = element; | |
} | |
} | |
if ( element.children.length > mostChildren ) { | |
mostChildren = element.children.length; | |
mostChildrenElement = element; | |
} | |
} ); | |
return { | |
'totalElementNodes': allElements.length, | |
'maxDepth': maxDepth, | |
'maxDepthElement': maxDepthElement, | |
'mostChildren': mostChildren, | |
'mostChildrenInElement': mostChildrenElement, | |
}; | |
} | |
lighthouseDomTest( document.body ); |
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https://developers.google.com/web/tools/lighthouse/audits/dom-size