When setting meta name=\'viewport\' content=\'target-densitydpi=device-dpi\', the Android browser and Opera Mobile treats a CSS pixel as a device pixel on my de
meta name=\'viewport\' content=\'target-densitydpi=device-dpi\'
check this link my be that's help you https://docs.google.com/present/view?id=dkx3qtm_22dxsrgcf4
You can write like this
check this link also https://www.davidbcalhoun.com/2010/the-viewport-metatag-mobile-web-part-1/