[英]AJAX post form won't work. It does absolutely nothing
我的代码中有一个错误,页面中还包含一个js文件,该文件阻止了$(document).ready(function(){
我正在尝试汇总此登录表单:
<form class="form" id="AjaxForm">
<input type="text" name="username" placeholder="Username">
<input type="password" name="password" placeholder="Password">
<button type="submit" id="login-button">Login</button>
</form>
通过带有此代码的ajax:
var request;
$("#AjaxForm").submit(function(event){
// Abort any pending request
if (request) {
request.abort();
}
// setup some local variables
var $form = $(this);
// Let's select and cache all the fields
var $inputs = $form.find("input, select, button, textarea");
// Serialize the data in the form
var serializedData = $form.serialize();
// Let's disable the inputs for the duration of the Ajax request.
// Note: we disable elements AFTER the form data has been serialized.
// Disabled form elements will not be serialized.
$inputs.prop("disabled", true);
// Fire off the request to /form.php
request = $.ajax({
url: "login.php",
type: "post",
data: serializedData
});
// Callback handler that will be called on success
request.done(function (response, textStatus, jqXHR){
// Log a message to the console
console.log("Hooray, it worked!");
});
// Callback handler that will be called on failure
request.fail(function (jqXHR, textStatus, errorThrown){
// Log the error to the console
console.error(
"The following error occurred: "+
textStatus, errorThrown
);
});
// Callback handler that will be called regardless
// if the request failed or succeeded
request.always(function () {
// Reenable the inputs
$inputs.prop("disabled", false);
});
// Prevent default posting of form
event.preventDefault();
});
我在这里找到的内容: PHP的jQuery Ajax POST示例
我正在尝试将其发布到login.php,它检查它是否是有效的用户名和密码。 但是,当我按下“登录”按钮时,它只是将用户名和密码放在url中,却什么也不做。 当我添加action =“ login.php” method =“ POST”时,它提交表单但不通过ajax提交,因为当我注释掉ajax代码时,它仍然提交。 我正在努力防止这种情况。 对我的问题有任何见解吗?
编辑:现在住在这里:http: //5f6738d9.ngrok.io/test/public/index.html用户名和密码已测试
您的提交按钮是标准的提交类型按钮,这意味着您的表单将正常提交。 根据您的HTML代码,它将仅将表单提交到相同的URL。 JS代码将没有时间执行。 您需要做的就是通过添加取消默认的HTML表单提交
event.preventDefault();
您需要在提交侦听器中添加第一件事。 因此,您的JS代码将像这样开始
$("#AjaxForm").submit(function(event){
event.preventDefault();
// Abort any pending request
if (request) {
request.abort();
}
//....
尝试使用以下代码:
$(document).ready(function(){
$('#AjaxForm').on('submit', function(event){
event.preventDefault();
if(request){
request.abort();
request = false;
}
var $form = $(this);
var serializedData = $form.serialize();
var $inputs = $form.find("input, select, button, textarea");
$inputs.prop("disabled", true);
var request = $.ajax({
url: 'login.php',
type: 'POST',
data: serializedData,
success: function (data, textStatus, jqXHR) {
// login was successful so maybe refresh the page
window.location.reload();
},
error: function (jqXHR, textStatus, errorThrown) {
// display form errors received from server
},
complete: function (jqXHR, textStatus) {
request = false;
}
});
});
});
检查事件是否绑定在$(document).on('ready' ...
否则事件将不会触发,并且表单将仅通过AJAX正常提交或不提交。
您的代码应如下所示:
$(document).on('ready', function () {
var request;
$("#AjaxForm").submit(function(event){
// Abort any pending request
if (request) {
request.abort();
}
// setup some local variables
var $form = $(this);
// Let's select and cache all the fields
var $inputs = $form.find("input, select, button, textarea");
// Serialize the data in the form
var serializedData = $form.serialize();
// Let's disable the inputs for the duration of the Ajax request.
// Note: we disable elements AFTER the form data has been serialized.
// Disabled form elements will not be serialized.
$inputs.prop("disabled", true);
// Fire off the request to /form.php
request = $.ajax({
url: "login.php",
type: "post",
data: serializedData
});
// Callback handler that will be called on success
request.done(function (response, textStatus, jqXHR){
// Log a message to the console
console.log("Hooray, it worked!");
});
// Callback handler that will be called on failure
request.fail(function (jqXHR, textStatus, errorThrown){
// Log the error to the console
console.error(
"The following error occurred: "+
textStatus, errorThrown
);
});
// Callback handler that will be called regardless
// if the request failed or succeeded
request.always(function () {
// Reenable the inputs
$inputs.prop("disabled", false);
});
// Prevent default posting of form
event.preventDefault();
});
});
请注意,实际上从jQuery 1.8开始不推荐使用这些回调事件。
在所有情况下,您还需要确保在表单上设置了POST
和action
属性。
我个人将使用它代替:
$(document).ready(function(){
$("#AjaxForm").on("submit",function(e){
e.preventDefault();
var $form = $(this);
var $cacheData = $form.find("input, submit");
var serializedData = $form.serialize();
$.ajax({
url: $form.attr("action"),
type: $form.attr("method"),
data: serializedData,
xhrFields: {
onprogress: function(e){
$cacheData.prop("disabled", true);
console.log(e.loaded / e.total*100 + "%");
}
},
done: function(text){
if(text == "Succes!"){
alert(text);
} else {
alert(text);
}
},
fail: function(xhr, textStatus, errorThrown){
alert(textStatus + " | " + errorThrown);
},
always: function(){
$cacheData.prop("disabled", false);
}
});
});
});
这使您可以做一些有用的事情:
请记住,尽管此脚本要求您在表单中设置HTML属性action
和method
。
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