Trying to get values of multiple inputs in an object and key will be index(0, 1, 2,3, 4,5) and values it's input value - Javascript

devReact
March 30, 2023
174 views
1 vote
2 Answers

I created five inputs and I am trying to get their values in an object after click on the button. The problem I am facing is that after the button click I am getting only index and value of last updated input.

function App() {
  const [dataItem, setDataItem] = useState({});
  let arr = [1, 2, 3, 4, 5];
  function getMultipleInputValue(index, e) {
    let newObj = {}
    newObj[index] = e.target.value;
    setDataItem(newObj)
  }

  function getDtat() {
    console.log("dataItem", dataItem)
  }

  return (
    <>
      {arr.map((data, index) => {
        return (
          <input type='text' name={index} key={data} onChange={(e) => 
          getMultipleInputValue(index, e)} />
        )
      })}
      <button onClick={() => getDtat()}>Click here</button>
    </>
  );
}

export default App;

Answers

- Gonzalingui
- March 30, 2023 at 7:48 pm
- 0 votes
0
You have to use all the previous values of the current state, and update the new value, something like this:
```
setDataItem(prevState => Object.assign({}, prevState, newObj));
```
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- DmitriPavlutin
- March 30, 2023 at 7:48 pm
- 0 votes
0
The problem is that you’re resetting the state with a new object:
```
  function getMultipleInputValue(index, e) {
    let newObj = {}
    newObj[index] = e.target.value;
    setDataItem(newObj) // resets the state to a new object
  }
```
Instead, what you need to do is update the current state object:
```
  function getMultipleInputValue(index, e) {
    setDataItem(newObj => ({...newObj, [index]: e.target.value}))
  }
```
Please check the fixed demo.

See also React docs on how to update the state based on the previous state.
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