To overwrite CSS inheritance styles, you can take the following methods: 1. Use more specific CSS selectors, such as adding class name hierarchy, using ID or attribute selector; 2. Use !important to force overwrite, only for debugging or third-party library conflicts, and add comments; 3. Use inline styles in special cases, but are not conducive to unified management; 4. Check the inheritance source, use the developer tools to view computed style, and adjust the parent or current element styles to overwrite the inheritance value. Mastering these tips can help solve problems where the style is not showing as expected.
Sometimes when you write a web page style, you will find that you clearly wrote CSS, but the elements on the page are not displayed as you expected. This is most likely because the style is inherited. It is actually not difficult to cover the inherited style, but you have to know a few key points.
Use a more specific CSS selector
When determining which style to use, the browser will give priority to using a "more specific" selector. For example, .parent .child is more specific than simple .child and is easier to override default or inherited styles.
For example:
.child {
color: red;
}
.parent .child {
color: blue;
} At this time, if the HTML is <div class="parent"><div class="child">Text</div></div> , the text will be blue because .parent .child is more specific.
You can use:
- Add class name level
- Use ID (although it is not recommended to abuse)
- Add extra attribute selectors and other methods to increase priority
However, be careful not to make the selector too complicated, otherwise it will be a headache to maintain later.
Use !important (use with caution)
If you really can't handle the inherited style, you can use !important to force overwrite. For example:
.child {
color: green !important;
}But this method is a bit like "hard" and can easily mess up the stylesheet. It is recommended to use it only when debugging or third-party library styles are difficult to overwrite.
Pay attention when using it:
- Do not use it frequently, otherwise it will affect maintainability
- It is best to add comments to explain why I used it
Direct inline style (use less)
You can also write style attributes directly in HTML tags, such as:
<div class="child" style="color: purple;">Text</div>
This writing method has high priority and can almost directly cover external CSS. But the problem is that writing styles like this is not conducive to unified management. Unless otherwise, it is better to write them in CSS files as much as possible.
Check inheritance sources and process them in a targeted manner
Sometimes the problem is not in your own code, but in the framework, component library, or browser default style. At this time you need:
- Open the browser developer tool to see which rule is finally applied
- See which class or parent it inherits from
- Targeted to adjust styles on that parent or current element
For example, some font colors are inherited from body. If you change the body's color, the following bunch of elements will change. At this time, you have to set a color for the child elements separately to overwrite the inherited value.
Basically these methods. It doesn't seem complicated, but in actual projects, you often encounter various "nothing changes" situations. Use developer tools to look at the computed style to find the problem.
The above is the detailed content of How do you override inherited styles?. For more information, please follow other related articles on the PHP Chinese website!
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