闭包的一些思考代码

[lmislm]

为什么形成了闭包，如何销毁

const api = async () => {
  let count = 0;
  return async () => {
    count++;
    return { count };
  };
};
const test = async () => {
  const fn = await api();
  return async () => {
    const res = await fn();
    console.log(res, "====");
  };
};
async function test1() {
  const fn = await test();
  fn();
  fn();
  fn();
  fn();
}
test1();