Press Enter to automatically submit the form and unexpected discovery_HTML/Xhtml_Web page production

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The code is as follows:

When you press Enter in the name input box of the above form, the form will be submitted. And there is no submit button in the form.

After many searches, I finally found the reason: If there is only one text box in the form, then when you press Enter, the form will be submitted.

So the solution is easy, just add a useless text box and hide it.

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The code is as follows:

Note: Adding a hidden box will not work.

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The code is as follows: