On Chrome and Firefox, a form is submitted if the return key is pressed inside any text input inside the form.
Is this behaviour part of the standard?
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On Chrome and Firefox, a form is submitted if the return key is pressed inside any text input inside the form.
Is this behaviour part of the standard?
No, this behavior is not required. I’m afraid it isn’t even mentioned in the HTML 4.01 specification, though this is probably just an oversight.
But it is very common behavior and needs to be taken into account: users may well accidentally submit form data by pressing Enter, when they still intended to continue filling it out.
There are some browser differences, e.g. IE 9 does not do anything when Enter is pressed in a field provided that a) there are more than one text input fields there and b) there is no submit button. On older versions, condition a) was sufficient, and this was more or less the original idea (the feature was meant to make it easy to use very simple search forms without causing confusion).