jquery attr() vs prop() (difference)

according to the docs

jQuery.attr()
Get the value of an attribute for the first element in the set of matched elements.

whereas,

 jQuery.prop()
Get the value of a property for the first element in the set of matched elements.

Before jQuery 1.6 , the attr() method sometimes took property values into account when retrieving some attributes, which caused in inconsistent behavior. And thus, the prop() method was introduced. As of jQuery 1.6. , the .prop() method provides a way to explicitly retrieve property values, while .attr() retrieves attributes.

What actually is Attributes?
Attributes carry additional information about an HTML element and come in name=”value” pairs. You can set an attribute for HTML element and define it while writing the source code.

simple example can be:
here, "type","value", "id" are attributes of the input elements.

What is Property?
Property is a representation of an attribute in the HTML DOM tree. once the browser parse your HTML code ,corresponding DOM node will be created which is an object thus having properties.
in above case ,once browser renders the input, other properties like align, alt, autofocus, baseURI, checked so on will be added ...

since, attr() gives you the value of element as it was defines in the html on page load. It is always recommended to use prop() to get values of elements which is modified via javascript/jquery , as it gives you the original value of an element's current state.

try it in fiddle

some other links to read more about attr() and prop().
Link 1
Link 2

Comments

  1. UnknownMay 4, 2013 at 2:45 AM

    Very interesting article I Lear something I didn't new.

    ReplyDelete
  2. vivekDecember 10, 2013 at 5:37 PM

    Nice Article

    ReplyDelete
  3. Passing strangeSeptember 28, 2015 at 11:20 AM

    1) The jQuery prop() grabs the specified DOM property whereas attr() grabs the specified HTML attribute.
    2) The jQuery prop() method returns boolean value for selected, checked, readOnly, disabled and so on while attr() returns a defined string.

    For details information look here:
    http://www.namasteui.com/difference-between-prop-and-attr/

    ReplyDelete
  4. UnknownDecember 27, 2015 at 9:00 AM

    Great answer.Couldn't find elsewhere such a simple and understanding explanation.

    ReplyDelete
  5. UnknownApril 13, 2017 at 10:03 PM

    Thanks now i can understand.

    ReplyDelete
  6. abazineJuly 19, 2017 at 11:34 AM

    New thing, thanks

    ReplyDelete
  7. UnknownJanuary 9, 2018 at 6:28 AM

    I am lucky to find this concise and well written explanation of attr vs prop in my first google search. great article. Thank you.

    ReplyDelete

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