The methods to use media queries in CSS to satisfy multiple conditions at the same time are as follows: 1. Use and to connect multiple conditions to ensure that all conditions are true, such as @media screen and (min-width: 600px) and (max-width: 900px) and (min-device-pixel-ratio: 2); 2. Use commas to represent the relationship of "or", as long as one of the conditions is satisfied, such as @media (max-width: 480px), (max-height: 320px); 3. You can clarify logical priorities through brackets to enhance readability; 4. Use not to negate a condition, such as @media not all and (max-width: 600px); 5. Use only to prevent error recognition from older browsers, such as @media only screen and (max-width: 600px). Correctly mastering these logical operators and syntax is the key to implementing complex media queries.

In CSS, if you want to meet multiple conditions at the same time in a media query, the method is actually quite straightforward. You can use logical operators to connect different conditions, the most commonly used ones are and and , (comma), and not . The point is that these conditions must be written clearly and correctly structured.

Use and connect multiple conditions

When you need to meet two or more conditions at the same time, you can use and to connect. For example, if you want to apply styles on devices with a screen width between 600px and 900px and a device pixel ratio of 2, you can write this:

 @media screen and (min-width: 600px) and (max-width: 900px) and (min-device-pixel-ratio: 2) {
  /* Style content*/
}

• Each condition must be established before the style will take effect.
• Note that the expressions in each bracket must be connected with and .
• If you miss a keyword, such as screen and , the entire media query may not work.

Use commas , indicate the relationship of "or"

If you want any condition to be satisfied to trigger a media query, you can use commas to separate different condition groups. For example:

 @media (max-width: 480px), (max-height: 320px) {
  /* Effective when the screen width is less than or equal to 480px or the height is less than or equal to 320px*/
}

• Each condition here is independent, and as long as one of them is satisfied, the style will be applied.
• Suitable for use in equipment that is suitable for a variety of different sizes or directions.

Pay attention to the syntax order and parentheses use

Although you can omit brackets in most cases, adding brackets in some complex scenarios will be clearer. For example, if you want to judge (min-width: 768px) 并且(orientation: landscape) or (min-width: 1024px) , it is recommended to add brackets to clarify the priority:

 @media (min-width: 768px) and (orientation: landscape), (min-width: 1024px) {
  /* ... */
}

Or to express the logic more clearly:

 @media ((min-width: 768px) and (orientation: landscape)), (min-width: 1024px) {
  /* ... */
}

However, note that not all browsers support this writing method. The addition of brackets is more for code readability, and the actual operation is still handled according to the default priority.

Tips: Don't forget not and only

In addition to and and commas, you can also use not to negate a certain condition:

 @media not all and (max-width: 600px) {
  /* Effective only when the width is greater than 600px*/
}

only is mainly used to prevent the old browser from misidentifying media queries:

 @media only screen and (max-width: 600px) {
  /* Only recognized by modern browsers*/
}

Basically that's it. The key to combining multiple conditions is to understand logical relationships and use keywords and syntax correctly. It may be a bit confused at the beginning, but it will be familiar with it after practicing a few more times.

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