js 如何检测 ppi

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没找到 api 接口。看到一种方式是 function getDocumentPPI() { var elem = document.createElement('div'); elem.style.width = '1in'; document.body.appendChild(elem); var ppi = elem.offsetWidth; document.body.removeChild(elem); return ppi; } 这种靠谱吗？

elem

var

PPI

div'

2 replies • 2017-06-10 19:04:07 +08:00

ghostheaven

Jun 10, 2017 via Android

devicePixelRatio?

wico97

Jun 10, 2017

@ghostheaven 不是，是 pixels per inch