样式化组件不会覆盖内联 styles

Question

I'm trying to override third party component inline style.

I followed the doc how can i override inline styles

So, I used &[style] to override the inline style but this is not working.

The third party component I use is CookieConsent

Right now, my component is looking like that:

import React from 'react';

import CookieConsent from 'react-cookie-consent';
import styled from 'styled-components';

const StyledCookieBanner = styled(CookieConsent)`
  &[style] {
    justify-content: center;
    align-items: center;
    width: calc(100% - 20px);
    margin: 10px;
    padding: 20px;
    background-color: white;
    border-radius: 22px;
    box-shadow: 0 0 19px 3px rgba(0, 0, 0, 0.17);
  }
`;

const CookieBanner = (): React.ReactElement => {
  return (
    <StyledCookieBanner debug buttonText='Ok'>
      Cookie
    </StyledCookieBanner>
  );
};

export default CookieBanner;

I also tried how can i override styles with higher specificity without success.

The only way I found to override the style is doing something like that and use !important

const StyledCookieBanner = styled(CookieConsent)`
  > div {
    justify-content: center;
    align-items: center !important;
    width: calc(100% - 20px) !important;
    margin: 10px;
    padding: 20px;
    background-color: white !important;
    border-radius: 22px;
    box-shadow: 0 0 19px 3px rgba(0, 0, 0, 0.17);
  }
`;

and also tried, without success

const StyledCookieBanner = styled(CookieConsent)`
  > div {
    // &&& {
    &[style] {
      justify-content: center;
      align-items: center;
      ...
    }
  }
`;

The docs seems pretty clear but I didn't succeed.

Did I miss something? Is that possible or should I use the style component props?

Answer 1

From the documentation page you linked:

Inline styles will always take precedence over external CSS, so you cannot override it by simply increasing specificity.

Let's stop right there. Styled Components adds classes to elements. In HTML/CSS, style attribute styles will almost always trump class-based styles; there is nothing Styled Components (or any other class-based library) can do to change that... unless you use a "hack" with !important that is...

There is a neat trick however, which is to use the style element-attr CSS Selector in conjunction with:important:

The !important is an essential part of that hack, and so the (working) code you posted:

const StyledCookieBanner = styled(CookieConsent)`
 > div {
    justify-content: center;
    align-items: center !important;
    width: calc(100% - 20px) !important;
    margin: 10px;
    padding: 20px;
    background-color: white !important;
    border-radius: 22px;
    box-shadow: 0 0 19px 3px rgba(0, 0, 0, 0.17);
  }
`;

is both correct, and your only option.

If you really want to override style attributes... override the style attributes:) Don't use Styled Components, use a style prop on your element (or in your case, ask react-cookie-consent to take a style prop to achieve that effect).