你知道JavaScript有内置的方法和库来创建和提交表单吗?

我在这里看到很多回复都要求使用第三方库，我认为这是多余的。

我将在纯Javascript中做以下工作:

<script>
function launchMyForm()
{
   var myForm = document.createElement("FORM");
   myForm.setAttribute("id","TestForm");
   document.body.appendChild(myForm);

// this will create a new FORM which is mapped to the Java Object of myForm, with an id of TestForm. Equivalent to: <form id="TestForm"></form>

   var myInput = document.createElement("INPUT");
   myInput.setAttribute("id","MyInput");
   myInput.setAttribute("type","text");
   myInput.setAttribute("value","Heider");
   document.getElementById("TestForm").appendChild(myInput);
   
// To submit the form: 
   myForm.method = "POST";
   myForm.action = "whatever.aspx";  // or "response.php" 
   myForm.submit();

// This will create an INPUT equivalent to: <INPUT id="MyInput" type="text" value="Heider" /> and then assign it to be inside the TestForm tags. 
}
</script>

这样(A)你就不需要依靠第三方来做这项工作。(B)所有浏览器都内置它，(C)更快，(D)它有效，请随意试用。

我希望这能有所帮助。

H

你知道JavaScript有内置的方法和库来创建和提交表单吗?

我在这里看到很多回复都要求使用第三方库，我认为这是多余的。

我将在纯Javascript中做以下工作:

<script>
function launchMyForm()
{
   var myForm = document.createElement("FORM");
   myForm.setAttribute("id","TestForm");
   document.body.appendChild(myForm);

// this will create a new FORM which is mapped to the Java Object of myForm, with an id of TestForm. Equivalent to: <form id="TestForm"></form>

   var myInput = document.createElement("INPUT");
   myInput.setAttribute("id","MyInput");
   myInput.setAttribute("type","text");
   myInput.setAttribute("value","Heider");
   document.getElementById("TestForm").appendChild(myInput);
   
// To submit the form: 
   myForm.method = "POST";
   myForm.action = "whatever.aspx";  // or "response.php" 
   myForm.submit();

// This will create an INPUT equivalent to: <INPUT id="MyInput" type="text" value="Heider" /> and then assign it to be inside the TestForm tags. 
}
</script>

这样(A)你就不需要依靠第三方来做这项工作。(B)所有浏览器都内置它，(C)更快，(D)它有效，请随意试用。

我希望这能有所帮助。

H

你可以使用XMLHttpRequest, fetch API，… 如果您想使用XMLHttpRequest，可以执行以下操作

var xhr = new XMLHttpRequest();
xhr.open("POST", url, true);
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.send(JSON.stringify({
    name: "Deska",
    email: "deska@gmail.com",
    phone: "342234553"
 }));
xhr.onload = function() {
    var data = JSON.parse(this.responseText);
    console.log(data);
};

或者如果你想使用取回API

fetch(url, {
    method:"POST",
    body: JSON.stringify({
        name: "Deska",
        email: "deska@gmail.com",
        phone: "342234553"
        })
    }).then(result => {
        // do something with the result
        console.log("Completed with result:", result);
    }).catch(err => {
        // if any error occured, then catch it here
        console.error(err);
    });

Fetch API旨在使GET请求变得容易，但它也能够POST。

let data = {element: "barium"};

fetch("/post/data/here", {
  method: "POST",
  headers: {'Content-Type': 'application/json'}, 
  body: JSON.stringify(data)
}).then(res => {
  console.log("Request complete! response:", res);
});

如果你和我一样懒(或者只是喜欢快捷方式/助手):

window.post = function(url, data) {
  return fetch(url, {method: "POST", headers: {'Content-Type': 'application/json'}, body: JSON.stringify(data)});
}

// ...

post("post/data/here", {element: "osmium"});

你可以像下面这样使用XMLHttpRequest对象:

xhr.open("POST", url, true);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
xhr.send(someStuff);

代码会将someStuff发布到url。只要确保在创建XMLHttpRequest对象时，它是跨浏览器兼容的。关于如何做到这一点，有无数的例子。

使用jbezz库的这个函数

var makeHttpObject = function () {
  try {return new XMLHttpRequest();}
  catch (error) {}
  try {return new ActiveXObject("Msxml2.XMLHTTP");}
  catch (error) {}
  try {return new ActiveXObject("Microsoft.XMLHTTP");}
  catch (error) {}
  throw new Error("Could not create HTTP request object.");
}
function SendData(data){
    let type = (data.type ? data.type : "GET")
    let DataS = data.data;
    let url = data.url;
    let func = (data.success ? data.success : function(){})
    let funcE =(data.error ? data.error : function(){})
    let a_syne = (data.asyne ? data.asyne : false); 
    let u = null;
    try{u = new URLSearchParams(DataS).toString();}catch(e){u = Object.keys(DataS).map(function(k) {return encodeURIComponent(k) + '=' + encodeURIComponent(DataS[k])}).join('&')}
    if(type == "GET"){url +="?"+u}
    const xhttp =  makeHttpObject();
    xhttp.onload = function(){func(this.responseText)}
    xmlHttp.onreadystatechange = function() {if (xmlHttp.readyState == 4) 
    {if(xmlHttp.status !== 200){funcE(xmlHttp.statusText)}}}
    xhttp.open(type,url,a_syne);
    xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xhttp.send(u);
}

使用这个运行:

SendData({
    url:"YOUR_URL",
    asyne:true,
    type:"POST", // or GET
    data:{
        username:"ali",
        password:"mypass" // Your Data
    },
    success:function(Result){
        console.log(Result)
    },
    error:function(e){
        console.log("We Have Some Error")
    }
});

Or

下载jbezz并添加到您的页面。

下载链接:github.com

使用:

$$.api({
        url:"YOUR_URL",
        asyne:true,
        type:"POST", // or GET
        data:{
            username:"ali",
            password:"mypass" // Your Data
        },
        success:function(Result){
            console.log(Result)
        },
        error:function(e){
            console.log("We Have Some Error")
        }
    });