React dynamic add select input field

Question

I am trying Create a select field dynamically. When clicking the add button, it will dynamically add select fields. I have and issue where the values don't change.

My code can be viewed on codesandbox:
https://codesandbox.io/s/react-select-field-dynamically-uo4dy?file=/src/App.js

Answer 1

Take a look at my changes:

Forked sandbox

// I added a 3rd argument for the name:    
const handleRoomChange = (option, index, name) => {
    const value = option.value; // you had this as 'const { value } = option.value' which dereferences value twice
    console.log(value);
    const list = [...roomInputs];
    list[index][name] = value; //you had this as list[index][value]
    setRoomInputs(list);
  };


// onChange passes the name as 3rd argument to handleRoomChange
<Select
   name="boardBasic"
    placeHolder="Board"
    value={options.value}
    onChange={option => handleRoomChange(option, i, "boardBasic")}
    options={options}
    styles={{
        menu: (provided) => ({ ...provided, zIndex: 9999 })
    }}
/>

Answer 2

You have three problems that I can see.

First, you only have a handleRoomChange function that is trying to handle both room changes and board changes. You should probably have a handleBoardChange function, as well.

Second, if you output option to the console inside handleRoomChange, you will notice that option.value is a number. So, when you proceed to set list[index][value] to value, what you're saying is that you want (for example) roomInputs[1][1] to be 1. roomInputs[1] has no 1 property, which is why you will end up with the wrong properties inside your object on submission. You need to be setting roomInputs[1].roomType to value, instead (and the boardBasic property in your handleBoardChange method, when you write it).

Third, you are trying to use object destructuring to assign object.value to your value variable...but you're trying to destructure object.value instead of destructuring object. For this reason, value is undefined every time you run the function. Replace the assignment with const { value } = option; and you will start getting defined values back.