Troubleshooting: CSS Styles not loading when passed as property in MUI withStyles

Question

Troubleshooting: CSS Styles not loading when passed as property in MUI withStyles

I am currently working on a react component that has a specific style defined as shown below:

const StyledInnerItem = withStyles((theme) => ({
  bgColor: {
    backgroundColor: (props) => {
      console.log('styledInnerItem color: ', props.color);
      return 'red';
    }
  }
}))(InnerItem);

My intention is to set the background color of the component based on the props.color value. However, I am facing an issue where it doesn't even return the temporary red color that I have set as the fallback option. When I check the logged props, it shows the correct color from the first render, and it gets added to the HTML file. However, the styles are only applied when I click on the component, resulting in the correct colors being displayed.

Everything works perfectly fine when the background color is not defined as a function. I need to achieve the same functionality by reading the color value directly from the props.

javascript css reactjs material-ui

Answer 1

Answer №1

It is possible that the issue arises from the withStyles HOC only updating styles upon component re-render, without triggering a re-render with new props. One solution is to set the color value as a state in the component and update it when props change, prompting a re-render and style update.

Here's a way to implement this:

const StyledInnerItem = withStyles((theme) => ({
  bgColor: {
    backgroundColor: (props) => props.color
  }
}))(InnerItem);

class InnerItemWrapper extends React.Component {
  state = {
    color: 'red'
  };

  componentDidUpdate(prevProps) {
    if (this.props.color !== prevProps.color) {
      this.setState({ color: this.props.color });
    }
  }

  render() {
    return <StyledInnerItem color={this.state.color} />;
  }
}

This approach ensures that changes in props.color trigger a re-render, keeping styles updated accordingly.

Answer 2

It is possible that the issue arises from the withStyles HOC only updating styles upon component re-render, without triggering a re-render with new props. One solution is to set the color value as a state in the component and update it when props change, prompting a re-render and style update.

Here's a way to implement this:

const StyledInnerItem = withStyles((theme) => ({
  bgColor: {
    backgroundColor: (props) => props.color
  }
}))(InnerItem);

class InnerItemWrapper extends React.Component {
  state = {
    color: 'red'
  };

  componentDidUpdate(prevProps) {
    if (this.props.color !== prevProps.color) {
      this.setState({ color: this.props.color });
    }
  }

  render() {
    return <StyledInnerItem color={this.state.color} />;
  }
}

This approach ensures that changes in props.color trigger a re-render, keeping styles updated accordingly.

Troubleshooting: CSS Styles not loading when passed as property in MUI withStyles

Answer №1

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