javascript - HTML viewport meta tag - Incorrect PPI/DPI/DPR values on android browsers -


i ran code below on browserstack identify various resolutions , dpi values browser reports on various android devices.

<html xmlns="http://www.w3.org/1999/xhtml">   <head>     <meta name='viewport' content='height=device-height, width=device-width, initial-scale=1' >   </head>   <body>     <script>             var w = window;             var d = document;             var e = d.documentelement;             var g = d.getelementsbytagname('body')[0];             var dpr = window.devicepixelratio || (window.screen.devicexdpi / window.screen.logicalxdpi);              document.write("dpi="+dpr);             document.write("<br>"+w.innerwidth+" x "+w.innerheight);             document.write("<br>"+navigator.useragent);     </script>   </body> </html>

i have summarized results below: first column gives device name, second column gives device resolution (as per browserstack), third column os, fourth column gives dpi/ppi/dpr value, final column gives resolution returned javascript.

galaxy tab 4,           800 x 1280     android 4.4             1      980 x 1230 kindle fire hdx 7,      600 x 960      android 4.3             1      800 x 1230 google nexus 4,         384 x 640      android 4.2             1      384 x 590  galaxy note 3,          360 x 640      android 4.3             1      432 x 718  galaxy s5,              360 x 640      android 4.4             1      980 x 590  galaxy s5 mini,         360 x 640      android 4.4             1      980 x 590  iphone 6 plus,          414 x 736      ios 8.3                 3      414 x 692  iphone 6,               375 x 667      ios 8.3                 2      375 x 623  ipad air                768 x 1024     ios 8.3 (safari)        2      768 x 1064  ipad mini 2,            768 x 1024     ios 8.3 (safari)        2      768 x 1064  iphone 5s,              320 x 588      ios 7.0                 2      320 x 504

i instead getting (x,y) resolution values

  1. that greater reported device. (compare column 2 5)
  2. and dpi value 1 (column 4). example, kindle fire reporting dpi of 1 incorrect.
  3. the x,y values same both landscape , portrait modes. ( not given in result above, onserved on browserstack. happening android devices. ios devices flipping (x,y) values correctly when switching between landscape , portrait mode.)

could me understand why happening?


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