Get checkbox with specific value

Question

I want to get checkbox with specfic value and make it checked..

I make like this

$(":checkbox").filter({"value":5}).attr("checked","true");​ 

and here is the html

​<input type="checkbox" name="priv"​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ value="1"​​​​​​​​​​​​​​​​​/> <input type="checkbox" name="priv" value="2"/> <input type="checkbox" name="priv" value="3"/> <input type="checkbox" name="priv" value="4"/> <input type="checkbox" name="priv" value="5"/> <input type="checkbox" name="priv" value="6"/> <input type="checkbox" name="priv" value="7"/>  <input type="checkbox" name="priv" value="8"/>​ 

here's a demo of the problem

Answer 1

You can use Attribute Equals Selector [name="value"] to get the checkboxes with particular value. Also use prop() instead of attr() as that is recommended way by jQuery doc.

Live Demo

$(":checkbox[value=4]").prop("checked","true"); 

or

$("input[type=checkbox][value=5]").prop("checked",true); 

Description: Selects elements that have the specified attribute with a value exactly equal to a certain value, jQuery doc.

You can also do it Using attr() but prop is more appropriate for boolean properties.

$(":checkbox[value=4]").attr("checked","true"); 

As of jQuery 1.6, the .attr() method returns undefined for attributes that have not been set. To retrieve and change DOM properties such as the checked, selected, or disabled state of form elements, use the .prop() method, jQuery doc

Edit, asked in comments, "How would look like the answer/find-expression with complex values, like value="Smith, David"

You can enclose that kind of values like Smith, David on single quotes. You can even use character used by jQuery like #, ., $ etc, see updated fiddle here.

$("input[type=checkbox][value='#Smith, David$']").attr("checked","true"); 

Answer 2

$(":checkbox").filter(function() {   return this.value == '5'; }).prop("checked","true");​ 

DEMO

If you want to use it for different values then make it generic like following:

function checkWithValue(val) {     $(":checkbox").filter(function() {         return this.value == val;     }).prop("checked", "true"); }   checkWithValue(5);​ 

DEMO