Mui autocomplete empty value

MUI Autocomplete – Handling Empty Values

The MUI Autocomplete component allows users to select one or more options from a predefined list. In some cases, you may want to allow the selection of an empty value as well. To handle empty values in MUI Autocomplete, follow these steps:

Step 1: Define the Autocomplete Component

First, create the Autocomplete component and define the necessary props. To allow an empty value, set the clearOnBlur prop to false. This prevents the selected value from being cleared when the Autocomplete loses focus.

    
      <Autocomplete
        options={options}
        clearOnBlur={false}
        // rest of the props
      />
    
  

Step 2: Handle the Empty Value

To handle the empty value when the user clears the selection, you can use the onInputChange and onChange event handlers.

    
      const handleInputChange = (event, value) => {
        // Handle input change event
      };
      
      const handleChange = (event, value) => {
        // Handle value change event
      };
      
      <Autocomplete
        onInputChange={handleInputChange}
        onChange={handleChange}
        // rest of the props
      />
    
  

In the handleInputChange event handler, you can check if the input value is empty (e.g., value === ''). If it is empty, you can perform any necessary actions, such as fetching new data or clearing the selected value.

In the handleChange event handler, you can check if the selected value is empty (e.g., value === null or value.length === 0). If it is empty, you can handle it accordingly, such as showing a validation error or performing a default action.

Example Usage

Here’s an example of using MUI Autocomplete with an empty value:

    
      import React, { useState } from 'react';
      import Autocomplete from '@mui/material/Autocomplete';
      
      const options = [
        { label: 'Option 1', value: 'option1' },
        { label: 'Option 2', value: 'option2' },
        { label: 'Option 3', value: 'option3' },
      ];
      
      const MyAutocomplete = () => {
        const [selectedValue, setSelectedValue] = useState(null);
        
        const handleInputChange = (event, value) => {
          // Handle input change event
        };
        
        const handleChange = (event, value) => {
          // Handle value change event
          setSelectedValue(value);
        };
        
        return (
          <Autocomplete
            options={options}
            clearOnBlur={false}
            onInputChange={handleInputChange}
            onChange={handleChange}
            value={selectedValue}
            // rest of the props
          />
        );
      };
      
      export default MyAutocomplete;
    
  

In the above example, the selectedValue state holds the currently selected option. When an empty value is selected or the input is cleared, the selectedValue will be null, indicating an empty selection.

Note that the example above assumes the usage of MUI version 5 and React Hooks. Adjust the code accordingly based on your project setup.