JQuery - $(document).getElementById('id').submit(function{}); unedifined not a function

问题

I've been searching or a solution to my problem, but none of the aswers I find are useful.

I try to make an automatic form that submits itself when the page loads.

$(document).getElementById('ticketCount').submit(function(){
    $.ajax({
        method:$(this).attr('method'),
        url:$(this).attr('action'),
        data:$(this).serialize()
    })
    .done(function(data){
        $('#ticketCount').html(data);
    })
    .error(function(data){
        console.log(data);
    });
  });

My console tells me that: "Uncaught TypeError: undefined is not a function". I don't think I made a mistake (I know this is case-sensitive), and I already used $(document).ready(), $(document).keyup(function{}) somewhere else in the same .js file, so I don't think the problem comes from $(document)..

I can't ind where my mistake is...

Thanks for your answers!

回答1:

.getElementById() -> this is javascript syntax to get the DOM element having a particular unique Id.

in jQuery it is deferent. You nead to have a selector for that DOM element

Many selectors are there. Here you nead ID SELECTOR. that is: #id

so you need to write like:

$('#ticketCount').submit(function(){
.............................

If you want to submit automatically when the page load use:

window.onload = function(){
  $('#ticketCount').trigger("submit");
};

回答2:

You've got 3 mistakes.

First: $(document) is not a DOM element, so .getElementById is undefined. Instead use the jQuery selector.

Second: .submit requires a user to press the submit button. Instead let's use $(document).ready

Change

 $(document).getElementById('ticketCount').submit(function(){

into

$(document).ready(function(){

Third: The jQuery ajax function doesn't have a property called method. Instead it has the type instead

Change

method:$(this).attr('method'),

into

type:$(this).attr('method'),

回答3:

use setTimeout

setTimeout(function(){
var elem = document.getElementById('ticketCount');
var $elem = $(elem);
 $.ajax({
        type:$elem.attr('method'),
        url:$elem.attr('action'),
        data:$elem.serialize()
    })
    .done(function(data){
        $elem.html(data);
    })
    .error(function(data){
        console.log(data);
    });
},500);

回答4:

$("#ticketCount").submit(function(){

change the code

$(document).getElementById('ticketCount').submit(function(){

 $("#ticketCount").submit(function(){

来源：https://stackoverflow.com/questions/23341103/jquery-document-getelementbyidid-submitfunction-unedifined-not-a-f

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javascript

jquery

undefined

typeerror