Updating Tailwind CSS to accommodate older web browsers by converting modern rgba() notation to be browser-compatible

I am facing a challenge with Tailwind CSS v3+ as it builds colors into the rgb space/color notation that is not compatible with an older browser (Safari 11) that my web app now needs to support.

For example, 

rgb(163 160 158 / var(--tw-bg-opacity)

The issue lies with the space separators and the / opacity syntax.

I have tried using regex perl operations to replace these elements in the build, but I could not find any information in the Tailwind CSS documentation regarding configuration or options for this.

npm run build && perl -pi -w -e 's/rgba?\\(\\s*\\d+)(\\s*\\s*\\d+)(\\s*\\s*\\d+) \\//rgba($1,$2,$3,/g)' dist/assets/index.*.css

However, my CI/CD deployment does not approve of this solution, and I believe there must be a more elegant way to address this issue.

Does anyone have suggestions for a better approach to handling this problem? How can I efficiently replace these elements without compromising functionality?

If it simplifies things, I do not use background-opacity in my application.

Thank you for your assistance.

javascriptcssnpmbuildtailwind-css

Answer №1

To disable the use of background-opacity, you can simply add a specific option to your tailwind.config.js:

module.exports = {
  corePlugins: {
    backgroundOpacity: false,
  },
}

This information was discovered in the Tailwind v2 documentation, although it is still relevant for the current version (Tailwind v3): docs.

As an example, consider the usage of the bg-red-400 utility:

<div class="bg-red-400">Background</div>

The resulting CSS class would be:

.bg-red-400 {
    background-color: #f87171;
}

Instead of using this format:

background-color: rgb(248 113 113 / var(--tw-bg-opacity));

Explore more examples on Tailwind-play

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