jquery: How to check if a keyword exists in a div?

How can I check f a keyword exists in a div?

for instance, this is my html,

<div class="item">
<div class="title">How to check if a keyword exists</div>
<div class="author">John J, 1990</div>
</div>

I tried with this method below but obviously doesn't work!

if ($('.item .author').text('John J').length > 0)
{
    alert('开发者_运维知识库found John J');

}

any ideas? thanks.

---

You can use the :contains selector, like this:

if ($('.item .author:contains("John J")').length > 0)
{
    alert('found John J');    
}

...or what you're probably ultimately after, something like this:

$('.item .author:contains("John J")').addClass("highlight");

By calling .text() you're setting the text, not checking for it. Using .text() for searching would look like this:

if ($('.item .author').text().indexOf("John J") != -1)
{
    alert('found John J');    
}

---

if ($('.item .author')[0].innerText.indexOf('John J')!=-1)
{
    alert('found John J');

}

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> 

<div class="item">
<div class="title">How to check if a keyword exists</div>
<div class="author">John J, 1990</div>
</div>
I tried with this method below and it now works!