jquery check if element checked code example

Example 1: jquery if checkbox checked

$( "SELECTOR" ).attr( "checked" )  // Returns ‘true’ if present on the element, returns undefined if not present
$( "SELECTOR" ).prop( "checked" ) // Returns true if checked, false if unchecked.
$( "SELECTOR" ).is( ":checked" ) // Returns true if checked, false if unchecked.

Example 2: jquery checkbox checked

$("checkbox").is(":checked")

Example 3: How do I check whether a checkbox is checked in jQuery?

$('#' + id).is(":checked")