Hey Julia, I’ve tinkered with react-dropdown-tree-select quite a bit and faced the exact same layout challenge a while back—let me share what worked for me!

Unfortunately, the component doesn’t have a built-in prop to reposition the search input directly. But we can fix this with either custom CSS or a custom toggle component—here are both approaches:

1. Quick Fix: Custom CSS Overrides #

This is the simplest method for most cases. We’ll target the component’s internal classes to adjust the flex layout:

/* Target the main toggle container to reverse its layout */
.rdts-toggle {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-between;
  align-items: center;
}

/* Make the search input take up available space */
.rdts-search-wrapper {
  flex-grow: 1;
  margin-right: 8px; /* Add spacing between input and toggle icon */
}

/* Keep the toggle icon from shrinking */
.rdts-toggle-icon {
  flex-shrink: 0;
}

If you’re using CSS Modules in your project, wrap the internal classes with :global() to target them properly:

.customDropdown :global(.rdts-toggle) {
  flex-direction: row-reverse;
  justify-content: space-between;
}

.customDropdown :global(.rdts-search-wrapper) {
  flex-grow: 1;
  margin-right: 8px;
}

Then apply the custom class to your component:

import DropdownTreeSelect from 'react-dropdown-tree-select';
import styles from './your-styles.module.css';

// ...

<DropdownTreeSelect
  className={styles.customDropdown}
  // Your other props (data, onChange, etc.)
/>

2. Full Control: Custom Toggle Component #

If you need more flexibility (like modifying the input’s structure or adding extra elements), use the renderToggle prop to build a custom layout from scratch:

const CustomToggle = ({ isOpen, onToggle, getSearchProps }) => (
  <div style={{ 
    display: 'flex', 
    alignItems: 'center', 
    width: '100%',
    border: '1px solid #ccc',
    padding: '4px 8px',
    borderRadius: '4px'
  }}>
    {/* Search input on the left */}
    <input
      {...getSearchProps()}
      placeholder="Choose.."
      style={{ 
        flexGrow: 1, 
        border: 'none',
        outline: 'none',
        marginRight: '8px'
      }}
    />
    {/* Toggle icon on the right */}
    <button 
      onClick={onToggle} 
      style={{ 
        border: 'none', 
        background: 'transparent',
        cursor: 'pointer'
      }}
    >
      {isOpen ? '▼' : '▲'}
    </button>
  </div>
);

// Use the custom toggle in your component
<DropdownTreeSelect
  renderToggle={CustomToggle}
  // Your other props
/>

Both methods should move the "Choose.." search area to the left while keeping the toggle functionality intact. The CSS approach is faster for basic layout changes, while the custom toggle gives you full control over the UI.

内容的提问来源于stack exchange，提问作者Julia