Can I trigger a CSS event in mobile safari upon iphone orientation change?

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I\'m trying to figure out how to change an embedded web page when the user rotates their phone from portrait to landscape mode - basically to load a view that is better suit

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既然无缘

2020-12-03 14:21

You can use the window.orientation property. Its value is the degree that the current mode of view is used. Here is a brief example:

function updateOrientation()
{   
    var orientation=window.orientation;
    switch(orientation)
    {

        case 0:

                break;  

        case 90:
                break;

        case -90:   

                break;
    }

}

You can use this function on this event:

window.onorientationchange=updateOrientation;

Hope that helps!

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北恋

2020-12-03 14:23

Safari Mobile supports orientation events.

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猫巷女王i

2020-12-03 14:30
```
<body onorientationchange="updateOrientation();">
```
From: Safari Web Content Guide
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灰色年华

2020-12-03 14:33

I can't believe no one talked about the css ruling:

@media screen and (max-width: 320px) // Portait Mode
{
/* CSS RULINGS */
p{}
body{}
}

@media screen and (min-width: 321px) // Landscape Mode
{
/* CSS RULINGS */
p{}
body{}
}

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醉酒成梦

2020-12-03 14:34
The Safari mobile browser has support for the orientationchange event as well as the orientation property on the window, so you can do something like:
```
window.onorientationchange = function() {
    switch(window.orientation) {
        case 0:   // Portrait
        case 180: // Upside-down Portrait
            // Javascript to setup Portrait view
            break;
        case -90: // Landscape: turned 90 degrees counter-clockwise
        case 90:  // Landscape: turned 90 degrees clockwise
            // Javascript to steup Landscape view
            break;
    }
}
```
I would add the upside-down because the iPad human interface guidelines say you should support all orientations, so I would expect Safari on the iPad (and possibly future iPhone versions) to support it.
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南笙

2020-12-03 14:36

Best not to set the onorientationchange property directly. Instead use the following:

window.addEventListener('orientationchange', function (evt) {
    switch(window.orientation) {
        case 0: // portrait
        case 180: // portrait
        case 90: // landscape
        case -90: // landscape
    }
}, false);

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