How JQ gets the reciprocal elements

<ul>
	<li> Penultimate </li>
	<li> The third from the bottom </li>
	<li> second to last </li>
	<li> The last one </li>
</ul>

jq Get last element ：

var text = $('ul li').last().text()
console.log(text)

Print the results ：

jq Get the penultimate element ：

var text = $('ul li').eq(-2).text()
console.log(text)

Print the results ：

expand ：

eq() Method ： Returns the element with the specified index number of the selected element .

grammar

$(selector).eq(index)

index There has to be , Index used to specify elements . It can be an integer or a negative number . among , Using a negative number will calculate the index from the end of the selected element .