How to add css of child tag based on parent tag in React?-PHP Chinese Network Q&A

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How to add css of child tag based on parent tag in React?

P粉258788831 2023-09-13 18:49:57

380

import React from 'react';
const style = {
    h2 : {
        fontSize: '20px';
        color: 'black';
    } & span: {
       color: 'white';
    }
}
const Main = () => {
    return (
        <h2 style={style}>Hello<span>Test</span></h2> 
   );
}
export default Main;

Note: can be dynamic. H2 is the parent tag and I have applied the style in the same tag and I want it to apply to the child tags as well ().

P粉258788831

reply all(1)

P粉8262835292023-09-14 12:15:28 1 floor

JSX style attributes are similar to HTML style attributes. Both the style attribute and attribute only accept CSS properties. Therefore, the use of selectors, pseudo-elements or pseudo-classes is not allowed.

Using style attributes

Replace the following:

const style = {
    h2 : {
        fontSize: '20px';
        color: 'black';
    } & span: {
       color: 'white';
    }
}

const Main = () => {
    return (
        HelloTest 
   );
}

and:

const h2Style = {
  fontSize: '20px';
  color: 'black';
}
const spanStyle = {
  color: 'white';
}

const Main = () => {
    return (
        HelloTest 
   );
}

or clearer:

const styles = {
  h2: {
    fontSize: '20px';
    color: 'black';
  },
  span: {
    color: 'white';
  }
}

const Main = () => {
    return (
        HelloTest 
   );
}

However, since you only want to define styles for h2 elements, we have more options:

CSS/SCSS

Using CSS on separate files:

import "./your-css.css";

const Main = () => {
    return (
        HelloTest 
   );
}

Among them, the .your-css.css file contains

.title {
  fontSize: '20px';
  color: 'black';
}

.title span {
  color: 'white';
}

Even nested (if you use a preprocessor like .scss)

.title {
  fontSize: '20px';
  color: 'black';

  span {
    color: 'white';
  }
}

CSS-in-JS

Considering a more "React" solution, we could use CSS-in-JS like styled-components Learn more

import React from 'react';
import styled from 'styled-components';

const Title = styled.h2`
  fontSize: '20px';
  color: 'black';

  span {
    color: 'white';
  }
`;

const Main = () => {
    return (
        Hello<span>Test</span> 
   );
}

export default Main;