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ClausClaus/dpi.js

Created January 28, 2019 01:24
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dpi设置
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dpi.js
(function () {
var width = parseInt(window.screen.width)
var designWidth = 450
var scale = width / designWidth
var userAgent = navigator.userAgent.toLowerCase()
var metaHead = '<meta name="viewport" content="width=' + designWidth + ','
if (/android (\d+\.\d+)/.test(userAgent)) {
if (parseFloat(RegExp.$1) > 2.3) metaHead += 'minimum-scale=' + scale + ',maximum-scale=' + scale + ','
} else {
metaHead += 'user-scalable=no,';
}
metaHead += 'target-densitydpi=device-dpi">';
document.write(metaHead);
})()
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