I need to get some colour values out of a DB and use them in my CSS so that each customer has a colour branded version of my React.js application, but I'm not sure how.
I have other elements of branding such as logos, slogans and terminology which I'm pulling out of the DB, storing as a JSON file, and referencing around the site, which works fine, but the problem is the colours which I need to use in my stylesheet as I need to use the pseudo classes that CSS offer.
I've found this postcss-import-json package which claims to do this, but I can't seem to get it to work as intended.
So far I've...
Imported the package...
npm install --save-dev postcss-import-json
Created a JSON file called 'masterConfig.json'
Imported the above file into my main stylesheet using the name i've called my colour (primary)...
:root { @import-json "../Assets/MasterConfig/masterConfig.json" (primary); }
Added the above colour name to my list of colours...
:root {primary: primary}
I've also tried this with the -- prefix by changing to @import-json... (primary as primary prefix --)
...and added it in my code where it is to be used...
style={{background: "var(--primary)"}}
^^^ with and without the prefix
Am I doing something wrong?
I've noticed in the example it uses the $ symbol, so can this only be used with SCSS?
Any help with this, or any other way to achieve this would be great, thanks!
So, I was quite surprised that I didn't already know how to do this, it seems so trivial and doesn't need any additional package.
To change a CSS varibale from JavaScript code, simply target the root element as you normally would, and set the property!
Create a variable (I'm using a fallback colour)
:root {--primary: #123456;}
I'm using React, and set this is my App.js componentDidMount function so it's global to my app. I've hard-coded the colour, but this can be pulled from the DB.
componentDidMount() {
const root = document.documentElement;
root.style.setProperty('--primary', '#CCCC00');
}
BooYaa!