type="submit" is used to submit a form, and clicking will trigger the default submission behavior; type="button" is a normal button, and JS operations need to be manually bound. 1. Clicking type="submit" in the form will automatically submit data to the specified address. Even if the onclick event is bound, it will not block the default behavior unless event.preventDefault() is used. 2. type="button" does not submit forms, and is suitable for performing custom logic such as verification and dynamic operations. It is often used in front-end frameworks to avoid missed submissions. 3. Note: When the type is not specified, the browser is regarded as submit by default. When doing non-submit operations, it must be set to button to prevent accidentally touching. The button tag is easier to control style than input. Select the type according to the purpose and it is safer to clearly write out the type attribute.
The difference between using type="submit"
or type="button"
in the form is actually very obvious, but many people are prone to confusion at the beginning. Simply put: submit
is to submit a form, while button
is an ordinary button that will not automatically trigger the submission behavior .

If you are writing form operation logic, selecting the wrong type may cause the form to not be submitted, or the JS event binding does not respond. Therefore, it is very important to understand their uses and usage scenarios.
1. type="submit"
: dedicated button for form submission
The function of this button is clear, clicking it will try to submit the current form . Regardless of whether you have written JS logic or not, as long as it is in the <form></form>
tag, clicking will trigger the browser's default submission behavior.

for example:
<form action="/submit" method="POST"> <input type="text" name="username" /> <button type="submit">Register</button> </form>
In the above code, click the "Register" button and the browser will submit the form data to /submit
.

Tip: Even if you bind the
onclick
event, the default behavior of the submit button will not be automatically blocked unless you callevent.preventDefault()
in JS.
2. type="button"
: a pure button that requires manual control of behavior
This button will not trigger any default form submission behavior and is suitable for binding custom JavaScript operations , such as form verification, dynamic field addition, switching status, etc.
for example:
<form id="myForm"> <input type="text" name="email" /> <button type="button" onclick="validateForm()">Verify the email</button> </form> <script> function validateForm() { const email = document.querySelector('[name="email"]').value; if (!email.includes('@')) { alert('The mailbox format is incorrect'); } } </script>
Clicking the button at this time will not submit the form, but will execute validateForm()
function you wrote.
Tips: If you are using front-end frameworks (such as React, Vue), you will usually use
type="button"
to avoid unexpected submissions.
3. Common misunderstandings and precautions
- The default type is submit : If you don't write
type
attribute, the browser will default totype="submit"
, which may not be the result you want. - Avoid miscommitting : When doing internal operations of the form (such as adding a line or deleting an item), be sure to use
type="button"
, otherwise the submission will be triggered if you are not careful. - The difference between
:
<button></button>
is more flexible, can place icons and text combinations, and the style is easier to control.
4. How to choose? Depend on demand
- If it is the "submit" button of the form, use
type="submit"
; - If it is functions such as "Cancel", "Add a Line", and "Preview", use
type="button"
; - When you are uncertain, write out
type
attribute clearly and do not rely on the default behavior.
Basically that's it. Although it seems simple, in actual development, figuring out the purpose of buttons can avoid many minor problems.
The above is the detailed content of HTML `button` `type='submit'` vs. `type='button'`. For more information, please follow other related articles on the PHP Chinese website!

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