What does the 'type' attribute with the value 'submit' mean in HTML?

The type="submit" attribute in an HTML <button> or <input> element specifies that this element is intended to submit a form. When clicking a button with this attribute, the browser collects data from all elements of the form that contains the button and sends it to the URL specified in the action attribute of the <form> tag (or to the current URL if action is not specified).

How it works:

• Inside <form>: A button with type="submit" is automatically associated with the nearest parent form. Clicking it initiates the standard form submission process via the HTTP method specified in the method attribute (default is GET).
• Outside <form>: A button with type="submit" outside a form does not have automatic form submission functionality. It can be used with JavaScript for manual form submission or other actions.

Example usage:

<form action="/submit-handler" method="POST">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username"><br><br>

  <label for="password">Password:</label>
  <input type="password" id="password" name="password"><br><br>

  <button type="submit">Submit Form</button>
</form>

In this example, clicking the "Submit Form" button will send the data from the username and password fields to the URL /submit-handler using the POST method.

Comparison with type="button":

Attribute	Purpose	Automatic form submission	Usage with JS
type="submit"	Submit form	Yes	Yes
type="button"	Arbitrary button, not related to submission	No	Yes