如何添加嵌套对象以获取 POST 正文？

Question

Given a simple fetch request ie

   fetch('https://api.com/endpoint', {
      method: "POST"
    });

Is it possible / how can following object be converted to query params / query string to append to the fetch request? Most methods online recommend using new URLSearchParams helper, however it doesn't seem to work with nested objects and when converted to string these nested objects are returned as [Object object] string. Ideal solution should not rely on any third party packages.

  {
    side: 'buy',
    symbol: 'AAPL',
    type: 'market',
    qty: '2',
    time_in_force: 'gtc',
    order_class: 'bracket',
    take_profit: {
      limit_price: '200'
    },
    stop_loss: {
      stop_price: '200'
    }
  }

Answer 1

Form your fetch request like this:

 fetch('https://api.com/endpoint', {
      method: "POST",
      headers: {
      'Content-Type': 'application/json'
          },
     body: JSON.stringify(dataYouWannaPost)

    });