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In this video we will discuss jQuery Element Selector, i.e selecting elements by tag name.
To select the elements by tag name use jQuery Element Selector
Syntax : $(element)
$(‘td’) // Selects all td elements
$(‘div a’) // Select all anchor elements that are descendants of div element
$(‘div, span, a’) // Selects all div, span and anchor elements
Alerts the total count of td elements on the page
[script type=”text/javascript”]
$(document).ready(function () {
alert($(‘td’).length);
});
[/script]
Selects all the tr elements on the page and changes their background colour to red
[script type=”text/javascript”]
$(document).ready(function () {
$(‘tr’).css(‘background-Color’, ‘red’);
});
[/script]
Alerts the HTML content of the table
[script type=”text/javascript”]
$(document).ready(function () {
alert($(‘table’).html());
});
[/script]
Alerts the HTML content of each table row
[script type=”text/javascript”]
$(document).ready(function () {
$(‘table tr’).each(function () {
alert($(this).html());
});
});
[/script]
Select and changes the background colour of all the div, span and anchor elements
[script type=”text/javascript”]
$(document).ready(function () {
$(‘div, span, a’).css(‘background-Color’, ‘yellow’);
});
[/script]
Select all anchor elements that are descendants of div element
[html]
[head]
[title][/title]
[script src=”jquery-1.11.2.js”][/script]
[script type=”text/javascript”]
$(document).ready(function () {
$(‘div a’).css(‘background-Color’, ‘yellow’);
});
[/script]
[/head]
[body]
[div]
[a href=”
[/div]
[br /]
[a href=”
[/body]
[/html]
Changes the background color of even rows to gray and odd rows to yellow in both the tables.
[script type=”text/javascript”]
$(document).ready(function () {
$(‘tr:even’).css(‘background-Color’, ‘gray’);
$(‘tr:odd’).css(‘background-Color’, ‘yellow’);
});
[/script]
To change the background color of even rows to gray and odd rows to yellow just for one of the table, use #id selector along with element selector.
[script type=”text/javascript”]
$(document).ready(function () {
$(‘#table1 tr:even’).css(‘background-Color’, ‘gray’);
$(‘#table1 tr:odd’).css(‘background-Color’, ‘yellow’);
});
[/script]
