Solving the Next.js CSS Module Not Included in React Component Issue

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Understanding the Problem

You have a React component that imports styles from a CSS module, but those styles do not seem to appear in your application. From your code, it appears you're trying to apply styles to a Toolbar component but with no success. Here’s a brief look at the relevant parts of your code:

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In the above code, you'll notice the mismatch between the naming conventions used in your CSS file and your React component.

The Solution

To resolve the issue of the CSS not being applied, you need to ensure consistency between your React component and your CSS module. Here are the steps to fix the problem:

1. Class Name Consistency

The class names you use in your CSS must match the names you are importing into your React component. In this case:

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to:

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2. Code Adjustments

Make sure that your React component is referencing this updated class name:

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3. Understanding Class Names

To further clarify:

Class names defined in CSS can use hyphens (e.g., .toolbar-container), but that syntax is not directly usable in JavaScript due to naming conventions conflicting with the subtraction operator.

Always ensure that your JavaScript is using camelCase for class names imported from CSS modules (like toolbarContainer).

Examples

Working Example

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Not Working Examples

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Or if your CSS file has:

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Conclusion