Js错误：“未捕获（承诺）SyntaxError：输入意外结束”答案

【问题标题】：Js error: "Uncaught (in promise) SyntaxError: Unexpected end of input"Js错误：“未捕获（承诺）SyntaxError：输入意外结束”
【发布时间】：2021-01-09 18:54:08
【问题描述】：

我遇到了错误：Uncaught (in promise) SyntaxError: Unexpected end of input 尝试将 refs 发布到我的专用快递服务器，你们能帮帮我吗？

function create() {

    event.preventDefault()

    firstName = document.getElementById('firstName').value
    lastName = document.getElementById('lastName').value
    username = document.getElementById('username').value
    password = document.getElementById('password').value

    const userInfo = {
        firstName: firstName,
        lastName: lastName,
        username: username, 
        password: password
    }

    const config = {
        method: "POST",
        mode: "no-cors",
        body: {userInfo},
        headers: {
            "Content-Type":"application/json"
        }
    }

    fetch('https://marcelochat.herokuapp.com/create', config)
    .then(res => res.json())
    .then(resp => {
        console.log(resp)
    })
}

错误在这里：.then(res => res.json()) 注意：firstName、lastName、username 和 password 常量是输入值

【问题讨论】：

标签： javascript express post

【解决方案1】：

    firstName = document.getElementById('firstName').value
    lastName = document.getElementById('lastName').value
    username = document.getElementById('username').value
    password = document.getElementById('password').value

这个变量是否超出范围？

如果没有，试试这个

  let  firstName = document.getElementById('firstName').value
  let  lastName = document.getElementById('lastName').value
  let  username = document.getElementById('username').value
  let  password = document.getElementById('password').value

config.body userInfo 应该在对象内部吗？

【讨论】：