javascriptcsscss-in-js

Which casing should I use for CSS classes when using CSS-in-JS?

I've read that the CSS-spec does not specify case-sensitivity, which has led to some browsers treating, for example, .myheader as equal to .myHeader . But since the standard in Javascript is to write variables in camelcase, how do I reconcile these two when using CSS-in-JS?

My React code could look like this:

import style from './style.module.css'
//...
<Button className={style.myButton} />

And the CSS would then break casing-convention:

.myButton {
    background-color: blue;
}

OR my React code could look like this (which is kinda ugly):

import style from './style.module.css'
//...
<Button className={style['my-button']} />

And the CSS would then follow the kebab-case convention:

.my-button {
    background-color: blue;
}
Solution

  • In React first one always works in case of modules, so you do not need to worry about it. So, going with the below convention works fine.

    React:

    import style from './style.module.css'
//...
<Button className={style.myButton} />

    CSS

    .myButton {
    background-color: blue;
}

    Refer to this Medium link for more insight: CSS in JS