mess属性有什么作用？

Question

I saw this on a question recently.

<input type="radio" mess="whats up" name="q1" value="A" class="correct"/>

I can't get what the mess attribute do, and I couldn't see any result on the internet. So what is the mess attribute for?

Answer 1

It can be called as custom attributes intended to store a piece of information (purely for developer puropse)but it not advisable.

Instead you can go for HTML5 custom data attribute like

data-mess="whats up"

It can be easily accessed with .data() in jQuery.

<input type="radio" data-mess="whats up" name="q1" value="A" class="correct"/>

See

$('.correct').data('mess') // to getch the value
$('.correct').data('mess', 'some value')  //to update the value

FYI:* custom data- ** is purely validated with w3c validator . Whereas not with yours.

Answer 2

It's just a way to store arbitrary data in the tag. It does whatever the programmer intends it to do. Some people prefer to add custom attributes via data-foo , others prefer this syntax.

Answer 3

There is no mess attribute, in the question he just used it to attr and get the value through JQuery.

For example:

checked = $('input:checked').attr('mess'); sets checked to whatever the checked input had on the ' mess attribute', as seen in the question.

Another example:

$('#BobDiv').attr('txt'); will return 'Bob' if your HTML is <div id = 'BobDiv' txt = 'Bob' />

As seen here, you have to amend it in your !DOCTYPE declaration, though.