fetch

基于promise实现。
javascript
// get
fetch("http://localhost:3000/users")
  .then(res=>{
    if(res.ok){
      return res.json()
    }else{
      return Promise.reject()
    }
  })
  .then(res=>{
    console.log(res)
  }).catch(err=>{
    console.log("err", err)
  })

// post
fetch("http://localhost:3000/users",{
  method: "post",
  headers:{
    // "content-type":"application/x-www-form-urlencoded"
    "content-type":"application/json"
  },
  // body:"name=tom&age=100"
  body:JSON.stringify({
    name: "tom",
    age: 100
  })
})
  .then(res=>res.json())
  .then(res=>{
    console.log(res)
})

// put
fetch("http://localhost:3000/users/2",{
  method: "put",
  headers:{
    // "content-type":"application/x-www-form-urlencoded"
    "content-type":"application/json"
  },
  // body:"name=tom&age=100"
  body:JSON.stringify({
    name: "tom",
    age: 18
  })
})
  .then(res=>res.json())
  .then(res=>{
    console.log(res)
})

// PATCH
fetch("http://localhost:3000/users/2",{
  method: "PATCH",
  headers:{
    // "content-type":"application/x-www-form-urlencoded"
    "content-type":"application/json"
  },
  // body:"name=tom&age=100"
  body:JSON.stringify({
    name: "tom",
    age: 18
  })
})
  .then(res=>res.json())
  .then(res=>{
    console.log(res)
})

// delete
fetch("http://localhost:3000/users/2",{
  method: "delete",
})
  .then(res=>res.json())
  .then(res=>{
    console.log(res)
})
fetch ​

fetch
