How to globally override Ant Design component styles using CSS Modules in React project?

This article explores how to globally override Ant Design component styles (such as Tabs components) in React projects using CSS Modules and resolves :global(...) syntax errors.

question:

Developers try to overwrite Ant Design's Tabs component style using CSS Modules, such as modifying the background color of the Tab tag to red. The code is as follows:

 // antdcustomstyle/index.module.css (Error code)
:global(
  .ant-tabs-tab {
    background-color: red;
  }
)

Error during compilation: syntax error: ... unknown word

Causes and solutions:

The error lies in :global syntax. The correct syntax is to place the selector in :global() and the style is defined in {} .

Correct code:

 // antdcustomstyle/index.module.css (correct code)
:global(.ant-tabs-tab) {
  background-color: red;
}

The modified code can correctly override the Ant Design default style. It should be noted that the writing method .myclass { :global(.ant-tabs-tab) { ... } } is wrong, because this attempt to define a global selector within the local scope of CSS Modules, which violates the original design intention :global . :global keyword aims to break through the scope limitations of CSS Modules and directly act on global styles.

Through the above correction, you can successfully use CSS Modules to globally overwrite the Ant Design component style to avoid :global syntax errors.

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