Babel Plugin - CSS Variables as React props

Set CSS variables on your elements as React props.

function Message({ isBold }) {
  return (
    <p className="text" c--font-weight={isBold ? "600" : "400"}>
      Hello World
    </p>
  );
}

• c is the default custom prefix to specify a CSS variable, hence c--font-weight. You can change this prefix in plugin options.
• Setting this CSS variable means that in the corresponding classname, you can set style as:

.text {
  font-weight: var(--font-weight, 400);
}

This is especially powerful in case of CSS-in-JS libraries where you can dynamically adapt styles without relying heavily on JavaScript.

const Text = styled.p`
  font-weight: var(--font-weight, 400);
`;

Installation

npm install --save-dev babel-plugin-css-variables-react-props

Usage

In .babelrc:

{
  "plugins": ["css-variables-react-props"]
}

Other options, visit Babel Plugins documentation

Options

Custom Prefix

To set a custom prefix, you can set plugin options in .babelrc.

{
  "plugins": [
    [
      "css-variables-react-props",
      {
        "prefix": "css"
      }
    ]
  ]
}

Now you can use the plugin in code as:

css--font-weight={isBold ? "600" : "400"}

Running Tests

To run tests, run the following command

  npm run test

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