Fetch Post Get XMLHttpRequest

Fetch请求示例：

const url = "http://example.com/";
const options = {
  method: "POST",
  headers: {
    Accept: "application/json",
    "Content-Type": "application/json;charset=UTF-8",
  },
  body: JSON.stringify({
    a: 10,
    b: 20,
  }),
};
 
fetch(url, options).then((response) => {
  console.log(response.status);
});