Jquery index()

gistfile1.txt

<ul>
    <div class="test"></div>
    <li id="foo1">foo</li>
    <li id="bar1" class="test">bar</li>
    <li id="baz1">baz</li>
    <div class="test"></div>
</ul>
<div id="last"></div>

var foo = $( "li" );
 
// This implicitly calls .first()
console.log( "Index: " + foo.index( "li" ) ); // 0
console.log( "Index: " + foo.first().index( "li" ) ); // 0
 
var baz = $( "#baz1" );
console.log( "Index: " + baz.index( "li" )); // 2
 
var listItem = $( "#bar1" );
console.log( "Index: " + listItem.index( ".test" ) ); // 1
 
var div = $( "#last" );
console.log( "Index: " + div.index( "div" ) ); // 2