Add HTML Attribute without a value using Jquery

Question

I want to add an attribute to a HTML element without a value using JQuery

<input id="r1" type="radio name="r1" value="1">

Add required

<input id="r1" type="radio name="r1" value="1" required>

How can this be done without the =""after the attribute?

don't worry about the ="", it's irrelevant just like the missing / — user400654
– user400654, Commented Jun 19, 2013 at 21:47
it's actually a boolean property and as such not required to have any value. You could add required='fred' and it would work the same. See :html5doctor.com/html5-forms-introduction-and-new-attributes — scrappedcola
– scrappedcola, Commented Jun 19, 2013 at 21:56

compid · Accepted Answer · 2013-06-19 21:55:47Z

8

The standard practice would be to set the property to true

$("#r1").prop("required", true);

This actually results in markup that exactly reads

<input id="r1" required>

JSFiddle demo: http://jsfiddle.net/8SrED/

edited Jun 19, 2013 at 21:55

answered Jun 19, 2013 at 21:50

compid

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4 Comments

Teemu Over a year ago

Afaik setting a property won't set an attribute, especially any custom attribute.

ojhawkins Over a year ago

Not sure if it matter but when I use that I get required="required" **** This was for $('#r1').attr() *****

dandavis Over a year ago

@teemu, there are lots of prop/attr bindings: title, name, id, rel, draggable, disabled, required, href, src, className/class, and more, just to name some common ones.

user400654 Over a year ago

setting the property using .prop sometimes will add an attribute and sometimes won't. It depends on the property and the browser, jQuery isn't doing it.

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