I've some drop down lists in my application which I'm filling programmatically, basically it's working fine but when I'm doing some output to console, i've got a lot of repetitive output.

      return (
    <InputGroup className="pdInputGroup">
      <InputGroup.Text className="pdInputGroupText">{props.name}</InputGroup.Text>
      <Dropdown onSelect={handleSelect} align='start'>
        <Dropdown.Toggle className={!!props.isInvalid ? "dropdown-btn dropdownError" : "dropdown-btn"}>{props.preSelection}</Dropdown.Toggle>
        <Dropdown.Menu>
        {
          list.map((item, index) => {
              console.log("item: " + item + " index: " + index);
              return <Dropdown.Item eventKey={index}>{item}</Dropdown.Item>
          })
        }
        </Dropdown.Menu>
      </Dropdown>
    </InputGroup>
  );

The beat is in sync with receipton of information from a websocket, a heartbeat from the backend service if an application is still responsible. The websocket information is not changing anything in this case, when heartbeat tells me that the application is not responsible or heartbeat is missing, a dialog is shown. Nothing more and it has no connection in my point of view of this drop down lists.

The output looks like this:

item: black index: 0 DropDownInput.js:27
item: white index: 1 DropDownInput.js:27
item: yellow index: 2 DropDownInput.js:27
item: green index: 3 DropDownInput.js:27
item: black index: 0 DropDownInput.js:27
item: white index: 1 DropDownInput.js:27
item: yellow index: 2 DropDownInput.js:27
item: green index: 3 DropDownInput.js:27
item: blue index: 4 DropDownInput.js:27
item: black index: 0 DropDownInput.js:27
item: white index: 1 DropDownInput.js:27
item: yellow index: 2 DropDownInput.js:27
item: green index: 3 DropDownInput.js:27
item: black index: 0 DropDownInput.js:27
item: white index: 1 DropDownInput.js:27
item: yellow index: 2 DropDownInput.js:27
item: green index: 3 DropDownInput.js:27
item: blue index: 4 DropDownInput.js:27

The application doesn't seem to have a problem either, or it is not being re-rendered, but I think that the output is not normal.

How can I debug this?