如何在查询参数 reactjs 中传递数组

Question

I Am using multiselect dropdown, what i want is whatever i've selected in dropdown to send it to the server by calling an api which contains query param to accomodate these dropdown result. I have made an array of selected items. Array(3) [ "IphoneXR", "Nokia", "Samsung" ] I want this array to get pass to below url like this: http://localhost:8080/details?dropdown=IphoneXR,Nokia,Samsung . With my approach i am ending up with this: http://localhost:8080/details?dropdown[]=IphoneXR&dropdown[]=Nokia . I am not sure why dropdown[] is coming twice. Can anyone please help me with it

Answer 1

If you are passing it directly to a url via the form actions it will sent it in the url as this: index.html? cars =saab& cars =opel& cars =audi

Try handling the form via js like this How handle multiple select form in ReactJS

Answer 2

Convert the array into string and pass the value in query param.

multiSelectHandler = (option) => {
    const details = option.selectedItems;
   const stringData =  details.map(({value}) => `${value}`).join(',');
   console.log(stringData);
  };

Array: Details: Output in console

0: Object { value: "Iphone", label: "Iphone" }
    ​1: Object { value: "Samsung", label: "Samsung"}

After converting into string:Output in console, Iphone,Samsung

Now pass this stringData in queryparam