html代码
<div class="d"> <div> </div> </div> <hr/> <div class="log"> </div>
js代码
$(".log").append($("html").css("font-size")+"<br/>"); $('.log').append( window.devicePixelRatio || 1);
css代码
html{ font-size:100px; } .d{ border:0.01rem solid red; width:1rem; height:1rem; }