Solution to Chapter 2 Exercises of Learning jQuery 3rd Edition

Exercises:

1. Add a class of special to all of the <li> elements at the second level of the
nested list.

$(document).ready(function () {
    $('li.horizontal').find('li').addClass('special');
});


2. Add a class of year to all of the table cells in the third column of a table.


$(document).ready(function () {
    $('td:nth-child(3)').addClass('year');
});


3. Add the class special to the first table row that has the word Tragedy in it.

$(document).ready(function () {
    $('tr').children(':contains(Tragedy)').first().addClass('special');
});


4. Challenge: Select all of the list items (<li>s) containing a link (<a>). Add the
class afterlink to the sibling list items that follow the ones selected.

$(document).ready(function () {
    $('li:has(a)').nextAll().addClass('afterlink');
});


5. Challenge: Add the class tragedy to the closest ancestor <ul> of any
.pdf link.

$(document).ready(function () {
    $('a[href$=".pdf"]').closest('ul').addClass('tragedy');
});


This is how the webpage looks after applying the above jQuery:

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