CSS 媒体查询将影响所有移动设备

Question

Total NOOB at web development and trying to teach myself here and it's quite daunting to say the least, but I'm having fun nonetheless.

Anyway, I know that media queries affect the way mobile devices render the page on various screen sizes, but I want to know if there's just one media query that can affect ALL mobile devices regardless of screen size?

I just want to make sure it won't affect the Desktop.

For instance I want to tweak a navigation menu on all mobile devices, but I don't want to meticulously change each media query that pertains to a screen size in my style.css.

I just want to create one media query to make this tweak that will affect all mobile screen sizes.

Hope that makes sense.

As always, you all are awesome!

Thanks for your help!

Answer 1

happy that you are choose to learn Web-Development.

But your way sounds more complicated than it is. First, Desktop and Mobile can be the same at all. It only counts down to Media Queries. On a Desktop, your Browser can be have the same width as a mobile device. So you need to clarify in your Project at which point you want to show the User the "Mobile" Styles and when to display the "Desktop" Styles. In most Projects I worked or saw, the default Media Queries are something like that:

@media (min-width: 320px) {}
@media (min-width: 768px) {}
@media (min-width: 1024px) {}
@media (min-width: 1220px) {}
@media (min-width: 1440px) {}

So you see on every media query you can attach some new styles for the selected query size. To make its easier for writing styles and don't override all these things on every new width, you can make something like that:

@media (min-width: 320px) {} // for general stylings (both, mobile && desktop)
@media (max-width: 767px) {} // for only styles between 320px and 768px (most mobile devies)
@media (min-width: 768px) {}  // general desktop && tablet styles if needed
@media (min-width: 768px) and (max-width: 1024px) {} // only tablet styles
@media (min-width: 1025px) // start with desktop styling

All these styles between the media queries are only attached to the sizes. So just choose your needed width, for example:

All mobile styles attached only between 320px and 1024px

@media (min-width: 320px) and (max-width: 1024px) {
  .nav{ background: red; }
}

All desktop styles attached only after 1025px
@media (min-width: 1025px) {
  .nav{ background: green; }
}

All these media queries just show the different widths, you also can do this by heights, but its way more difficult because of the device/display sizes.

If you really want to check the User Agent and divide between the browser, agents, devices or something like that you will need JavaScript and thats way more complex than just display the styles for different widths.

I hope this helps you! If you have any questions about Media Queries and how to write them correctly, MDN is a good resource: MDN - Media Queries

Answer 2

For anyone looking for a generic and easy media query for mobile, I would suggest the following:

@media screen and (max-width: 767px) {}

Similar to the suggestion by @m4n0, but this is the correct query including the "and". This is a good start, and then you can continue to define more breakpoints as you need more responsiveness along the way.

Answer 3

It depends on is your mobile layout is designed. As even in the mobile view you need to think about Portrait and landscape mode. For some common styling, I normally use

@media screen  (max-width: 767px) { }

You can also use orientation to set media queries like below

@media screen  and (max-device-width: 480px) and (orientation: portrait) { 
  Your classes here
}

@media screen  and (max-device-width: 640px) and (orientation: landscape)  {
  Your classes here
}

Answer 4

Great question, Android and Apple devices in my search normally fall within 450px in portrait and 800px on landscape, I would suggest you create a media query for both these sizes and you would have covered a high number of mobile devices in both portrait mode and landscape mode. If you are targeting a specific device I would suggest looking up those specific screen viewport sizes and adjusting or adding more media queries to cover those cases. Hope this helps! Keep learning.

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Credit to following link for Popular Device Screen Resolution Sizes
https://mediag.com/blog/popular-screen-resolutions-designing-for-all/

Credit to following link for great explanation of Responsive Design
https://www.toptal.com/responsive-web/introduction-to-responsive-web-design-pseudo-elements-media-queries