How to Detect Dark Mode in JavaScript for Styling Stripe Elements?

Detecting Dark Mode in JavaScript for Use with Stripe Elements API

Windows and macOS now offer dark modes, allowing users to adjust the interface color scheme to their preference. For styling CSS, the @media (prefers-dark-interface) can be used to apply specific rules for dark mode. However, this approach won't directly affect components styled in JavaScript, such as those created with the Stripe Elements API.

To detect the operating system's preferred color scheme in JavaScript, the window.matchMedia method can be utilized:

if (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) {
    // dark mode is enabled
}

This check will return true if the user has enabled dark mode on their system. You can then use this information to dynamically apply custom styles to your Stripe Elements, ensuring consistency with the user's preferred interface theme.

For example, if you want to set the text color of Stripe Elements to white when dark mode is enabled, you could use the following snippet:

const stripeElementStyles = {
  base: {
    color: window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches ? COLORS.white : COLORS.darkGrey,
    // ... other styles
  }
}

Additionally, if you want to monitor changes in the user's color scheme preference, you can use the addEventListener method:

window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', event => {
    const newColorScheme = event.matches ? 'dark' : 'light';
    // Update styles based on the new color scheme
});

By implementing these techniques, you can ensure that your Stripe Elements seamlessly adapt to the user's preferred color scheme, providing a consistent and visually pleasing experience regardless of their operating system or device settings.

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