'How to customise React AsyncSelect style

I am trying to customise the style of AsyncSelect component, but seems not able to do it.

import AsyncSelect from 'react-select/async';
<AsyncSelect
  classNamePrefix='testSelect'
  ......
/>

scss file: Both ways are not working

.testSelect__menu {
  box-shadow: 5px 5px 15px -5px #ccc, -5px 5px 15px -5px #ccc !important;
  background-color: black !important;
  z-index: 10 !important;
}
.testSelect {
  &__menu {
    box-shadow: 5px 5px 15px -5px #ccc, -5px 5px 15px -5px #ccc !important;
    background-color: black !important;
    z-index: 10 !important;
  }
}

Anyone knows how to solve the issue? Thanks in advance.



Solution 1:[1]

I have made a codesandbox & the css class testSelect__menu is applied to the inner elements. Which results in the output -

enter image description here

Maybe you want to look into if scss is configured correctly or not?

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Aseem Gautam