Change Value Of Input And Submit Form In Javascript

Changing the value of an input field and submitting a form dynamically using JavaScript can be a handy feature when working on web development projects. By doing this, you can create interactive user experiences and enhance the functionality of your web applications. In this article, we will guide you through the process of changing the value of an input field and submitting a form using JavaScript.

To get started, let's first understand how to change the value of an input field using JavaScript. You can target an input field in your HTML document using its id attribute and then update its value property using JavaScript. Here's a simple example:

<button>Change Value</button>


function changeInputValue() {
  document.getElementById("myInput").value = "New Value";
}

In the above code snippet, we have an input field with the id "myInput" and an initial value of "Initial Value." We also have a button that, when clicked, calls the `changeInputValue()` function to update the input field's value to "New Value."

Next, let's move on to submitting a form dynamically using JavaScript. You can programmatically submit a form in JavaScript by calling the `submit()` method on the form element. Here's an example demonstrating how to achieve this:

<button>Submit</button>



function submitForm() {
  document.getElementById("myForm").submit();
}

In this code snippet, we have a simple form with two input fields for username and email. When the button inside the form is clicked, the `submitForm()` function is triggered, which submits the form programmatically.

Now, let's combine the concepts of changing the input field value and submitting the form dynamically. Below is an example that changes the input field value and then submits the form when a button is clicked:

<button>Submit Form After Changing Value</button>



function changeInputAndSubmit() {
  document.getElementById("myInput").value = "New Message";
  document.getElementById("myForm").submit();
}

In this final example, we have an input field pre-filled with the text "Hello, World!" When the button is clicked, the `changeInputAndSubmit()` function is called, which updates the input field value to "New Message" and then submits the form.

In conclusion, by leveraging JavaScript, you can easily change the value of an input field and submit a form dynamically on your websites or web applications. This functionality can enrich user interactions and streamline the user experience. Experiment with these examples and integrate them into your projects to enhance the interactivity of your web forms.