Function fetchData

suspense-error-boundary/src/App5.jsx:5–14

()

let data, promise;
function fetchData() {
  if (data) return data;
  promise = new Promise(resolve => {
    setTimeout(() => {
      data = '取到的数据'
      resolve()
    }, 2000)
  })
  throw promise;
}

function Content() {
  const data = fetchData();