Click submit button with javascript

How to simulate user’s click on the submit button in javascript when the «select» element changes?

I’ve got a simple html form. I would like to simulate user’s click on the submit button in javascript when the «select» element changes. So, I’ve tried to do that with the function onchange of the selects. I don’t know how to write the function that would send the form. I have searched through this site, but I did’t find anything that would work for me. It simply didn’t do anything. It did not send the form. Maybe I only needed to include something, but I didn’t, so maybe if I did, it would work. I really don’t know. I am new in javascript. I would be very thankful for a piece of java script code (the function) and maybe the CDN or file that I need, if I do.

   //probably I need to include something here (if so, could you please send me the CDN?)   2009 2010 2011 2012 2013 2014 2015 2016 2017 2018  January February . . December  1 2 . . . 30 31    

Okay maybe im wrong but without an action attribute the form normally cannot be sended. If the answer of Terry is not working add the action attribute

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submit

Событие submit возникает, когда пользователь отправляет валидную форму. Если форма невалидна и её нельзя отправить, то и submit не будет.

Как пишется

Скопировать ссылку «Как пишется» Скопировано

На submit можно подписаться и отреагировать, например, сказать спасибо:

 document.addEventListener('submit', function ()  alert('Спасибо, что заполнили форму!')>) document.addEventListener('submit', function ()  alert('Спасибо, что заполнили форму!') >)    Скопировать Скопировано Не удалось скопировать   

Как понять

Скопировать ссылку «Как понять» Скопировано

Пользователь может отправить форму (и создать для нас событие submit ) разными способами. Например, нажать клавишу Enter внутри поля или кликнуть по кнопке .

Если мы вытащим, например, кнопку из формы, то событие submit при клике на кнопку уже не произойдёт, потому что связи с формой больше нет. В то же время, нажатие Enter внутри поля будет работать.

    Нажмите Enter в поле:   Или кликните тут  div> form> label for="input-field">Нажмите Enter в поле:label> input id="input-field" type="text"> form> div> div> button>Или кликните тутbutton> div>    Скопировать Скопировано Не удалось скопировать   

 document.addEventListener('submit', function ()  alert('Случился submit')>) document.addEventListener('submit', function ()  alert('Случился submit') >)    Скопировать Скопировано Не удалось скопировать   

На практике

Скопировать ссылку «На практике» Скопировано

Алексей Никитченко советует

Скопировать ссылку «Алексей Никитченко советует» Скопировано

🛠 За отправкой формы лучше всегда наблюдать через подписку именно на событие submit .

Это удобнее и правильнее, ведь submit связан сразу с каждым элементом формы, а пользователь может отправить её разными способами. Например, нажать на клавишу Enter в поле ввода и не трогать вовсе красивую кнопку подтверждения. В то же время подписка на другие события, например на click по кнопке, будет лишь косвенно связано с отправкой формы.

В примере ниже подпишемся на событие click по кнопке формы и выведем сообщение с названием элемента, на котором сработает click . Попробуйте нажать Enter внутри поля ввода ⌨️.

 const button = document.getElementById('submit-button') button.addEventListener('click', function (event)  alert(`Событие поймано на $`)>) const button = document.getElementById('submit-button') button.addEventListener('click', function (event)  alert(`Событие поймано на $event.currentTarget>`) >)    Скопировать Скопировано Не удалось скопировать   

Хотя мы не трогаем кнопку, событие click на ней всё равно возникает. При отправке формы браузер «синтетически» кликает по кнопке на случай, если какое-то действие привязано к ней, а не к submit . Но выходит мы работаем с одним элементом, а событие возникает на другом.

Иначе с submit — мы точно работаем с формой в целом вместо отдельных элементов и улучшаем доступность для пользователей без мыши.

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How to Submit a Form with JavaScript – JS Submit Button Example

Joel Olawanle

When building applications and websites on the internet, you’ll sometimes need your users to supply information by filling out a form.

But then you might wonder – how do you get this data from the form? Well, you can do this with JavaScript.

In this article, you will learn how to create a form and get data from it when the form is submitted with JavaScript.

This article won’t cover how to input data into a database – it will only cover how to submit a form. But you should know that once you have this data, you can send it to the database of your choice, use it to manipulate information, and much more.

To submit a form using JavaScript, you must first create the form and add distinctive, specific attributes to the input fields. You will use these attributes to retrieve the data when the user submits and then calls a function to handle validations (possibly if any data is submitted).

How to Create the HTML Form

To get started, let’s create a basic HTML form with two fields: username and password. We’ll also add a button that will be used to submit the form and trigger a JavaScript action.

To get this form’s data via JavaScript, you’ll need to attach specific attributes to the form input field and the form itself. These attributes can be an id , a class , or even with the name tag. This will help get the data in JavaScript using their document methods.

For example, if you use an id attribute on your input field, you can access the input field data and other values using the document method getElementByID(‘idName’) :

// HTML // JS let myUsername = document.getElementById('username'); console.log(myUsername); 

If you use a class attribute, you’ll use getElementsByClassName(className) , which returns an array of all elements with the className . If it is only one element, you can use the index number 0 to access its data:

// HTML // JS let myUsername = document.getElementsByClassName('username'); console.log(myUsername[0]); 

If you use the name attribute, you’ll use getElementsByName(name) . This is similar to how the class attribute works since it also returns an array which you can loop through or access with its index number:

// HTML // JS let myUsername = document.getElementsByName('username'); console.log(myUsername[0]); 

Note: This will not return the input value but the input element itself.

How to Submit a Form with JavaScript

The first step is to attach your preferred attribute to the form, which you can use to track when the form is submitted. This can be an id , class or name attribute, but for this article, I will use id for the form and input fields:

At this point, you can now handle form submission with JavaScript. You first get the form with your preferred attribute, which can be an id, and store it in a variable:

let loginForm = document.getElementById("loginForm"); 

Then you can attach the addEventListener to the form variable and listen for a submit event. This event listener allows you to attach a callback function which gets triggered once the form is submitted:

loginForm.addEventListener("submit", (e) => < e.preventDefault(); // handle submit >); 

At this point, you can now get the form data and handle any operation you wish. For this article, let’s first validate the data by checking if the input is empty before performing any operation:

loginForm.addEventListener("submit", (e) => < e.preventDefault(); let username = document.getElementById("username"); let password = document.getElementById("password"); if (username.value == "" || password.value == "") < // throw error >else < // perform operation with form input >>); 

This is the entire JavaScript code:

let loginForm = document.getElementById("loginForm"); loginForm.addEventListener("submit", (e) => < e.preventDefault(); let username = document.getElementById("username"); let password = document.getElementById("password"); if (username.value == "" || password.value == "") < alert("Ensure you input a value in both fields!"); >else < // perform operation with form input alert("This form has been successfully submitted!"); console.log( `This form has a username of $and password of $` ); username.value = ""; password.value = ""; > >); 

Conclusion

In this article, you have learned how to submit a form with JavaScript and how it works with the various DOM methods.

There are other ways you can do this, but this is a straightforward way to handle submission in JavaScript.

You can access over 150 of my articles by visiting my website. You can also use the search field to see if I’ve written a specific article.

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JavaScript Submit Form on Click

1. Submit a Form by Clicking a Link and Using the submit() Function in JavaScript
2. Submit a Form by Clicking a Button and Using the submit() Function in JavaScript

This tutorial will discuss how to submit a form using the submit() function in JavaScript.

Submit a Form by Clicking a Link and Using the submit() Function in JavaScript

In JavaScript, you can create a form using the form tag, you can give the form an id using the id attribute, and after that, you have to choose a method to submit your form like, you can submit the form when a link or a button is clicked. Now, there are two methods to submit a form, and you can either do it inside the HTML code by using the onclick attribute or do it inside the JavaScript. For example, let’s submit a form inside the HTML using the onclick attribute. See the code below.

form id="FormId">  a href="FormLink" id = "LinkID" onclick="document.getElementById('FormId').submit();"> SubmitForm a>  form> 

You can change the form id and the link id in the above code according to your requirements. This method is not recommended because you are mixing HTML with JavaScript code. You can also do that separately in JavaScript by using the id of both form and link. For example, let’s do the above operation using separate JavaScript. See the code below.

var myform = document.getElementById("FormId"); document.getElementById("LinkId").addEventListener("click", function ()   myform.submit(); >); 

This method is recommended because the HTML and JavaScript are in separate files. Note that you have to use the form id and link id that you have defined in the HTML to get those elements in JavaScript. The form will be submitted when the link is clicked.

Submit a Form by Clicking a Button and Using the submit() Function in JavaScript

You can use a button to submit a form. There are two methods to submit a form, and you can either do it inside the HTML code by using the onclick attribute or do it inside the JavaScript. For example, let’s submit a form inside the HTML using the onclick attribute. See the code below.

form id="FormId">  button id = "ButtonId" onclick="document.getElementById('FormId').submit();"> SubmitForm button>  form> 

Similar to the above method, this method is not recommended because you are mixing HTML with JavaScript code. Let’s do the above operation using separate JavaScript.

var myform = document.getElementById("FormId"); document.getElementById("ButtonId").addEventListener("click", function ()   myform.submit(); >); 

Hello! I am Ammar Ali, a programmer here to learn from experience, people, and docs, and create interesting and useful programming content. I mostly create content about Python, Matlab, and Microcontrollers like Arduino and PIC.

Related Article — JavaScript Form

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