CSS Media Queries Does Not Seem To Be Working Properly - html

Question

I have added this CSS media setting for changing the font size of a web page when it comes to iPhone sizes:
body{
font-size:10pt;
}
#media only screen and (max-width: 375px) {
body{
font-size:20pt;
}
}
But when I resize it, it does not show the font size of 20pt.
I have also added this meta tag:
<meta name="viewport" content="width=device-width, initial-scale=1">
So what's going wrong here?
How can I properly add the CSS media queries for iPhone sizes with a maximum width of 375px?
Thanks in advance.

Answer 1

its depend in which model you are testing.
/* ----------- iPhone 4 and 4S ----------- */
/* Portrait and Landscape */
#media only screen
and (min-device-width: 320px)
and (max-device-width: 480px)
and (-webkit-min-device-pixel-ratio: 2) {
}
/* Portrait */
#media only screen
and (min-device-width: 320px)
and (max-device-width: 480px)
and (-webkit-min-device-pixel-ratio: 2)
and (orientation: portrait) {
}
/* Landscape */
#media only screen
and (min-device-width: 320px)
and (max-device-width: 480px)
and (-webkit-min-device-pixel-ratio: 2)
and (orientation: landscape) {
}
/* ----------- iPhone 5, 5S, 5C and 5SE ----------- */
/* Portrait and Landscape */
#media only screen
and (min-device-width: 320px)
and (max-device-width: 568px)
and (-webkit-min-device-pixel-ratio: 2) {
}
/* Portrait */
#media only screen
and (min-device-width: 320px)
and (max-device-width: 568px)
and (-webkit-min-device-pixel-ratio: 2)
and (orientation: portrait) {
}
/* Landscape */
#media only screen
and (min-device-width: 320px)
and (max-device-width: 568px)
and (-webkit-min-device-pixel-ratio: 2)
and (orientation: landscape) {
}
/* ----------- iPhone 6, 6S, 7 and 8 ----------- */
/* Portrait and Landscape */
#media only screen
and (min-device-width: 375px)
and (max-device-width: 667px)
and (-webkit-min-device-pixel-ratio: 2) {
}
/* Portrait */
#media only screen
and (min-device-width: 375px)
and (max-device-width: 667px)
and (-webkit-min-device-pixel-ratio: 2)
and (orientation: portrait) {
}
/* Landscape */
#media only screen
and (min-device-width: 375px)
and (max-device-width: 667px)
and (-webkit-min-device-pixel-ratio: 2)
and (orientation: landscape) {
}
/* ----------- iPhone 6+, 7+ and 8+ ----------- */
/* Portrait and Landscape */
#media only screen
and (min-device-width: 414px)
and (max-device-width: 736px)
and (-webkit-min-device-pixel-ratio: 3) {
}
/* Portrait */
#media only screen
and (min-device-width: 414px)
and (max-device-width: 736px)
and (-webkit-min-device-pixel-ratio: 3)
and (orientation: portrait) {
}
/* Landscape */
#media only screen
and (min-device-width: 414px)
and (max-device-width: 736px)
and (-webkit-min-device-pixel-ratio: 3)
and (orientation: landscape) {
}
/* ----------- iPhone X ----------- */
/* Portrait and Landscape */
#media only screen
and (min-device-width: 375px)
and (max-device-width: 812px)
and (-webkit-min-device-pixel-ratio: 3) {
}
/* Portrait */
#media only screen
and (min-device-width: 375px)
and (max-device-width: 812px)
and (-webkit-min-device-pixel-ratio: 3)
and (orientation: portrait) {
}
/* Landscape */
#media only screen
and (min-device-width: 375px)
and (max-device-width: 812px)
and (-webkit-min-device-pixel-ratio: 3)
and (orientation: landscape) {
}