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aBbccDd AaBbCcbd AaBbC AaBbCc Add ca .Ed-1-TNormal 11No spacing :- Paragraph Heading 1 Heading 2 Title Lab - jQuery 1.) Go to the JQuery exercises at the below website: http://www.w3resource.com/jquery-exercises/ 2.) Choose 1 exercise to complete from each of the following links: jQuery Core, jQuery CSS, jQuery Events, and jQuery Effects 3.) Submit all code from each example.
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Answer #1

1. Find all h1 elements that are children of a div element and apply a background to them.

Either use the jQuery code to the same html file or can use external js file by link. Both method are below to use the jquery.

code: html with Jquery.

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Find all h1 elements that are children of a div element and apply a background to them</title>

</head>

<body>

<h1>abc</h1>

<div>

<h1>First div h1</h1>

<h1>Second div h1</h1>

</div>

<h1>xyz</h1>

</body>

<script>

$( "div > h1" ).css("background", "#0686c9");

</script>

</html>

output:

abc First div hl Second divhỉ xyz

code with separate jquery and html file.

html:

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Find all h1 elements that are children of a div element and apply a background to them</title>

</head>

<body>

<h1>abc</h1>

<div>

<h1>First div h1</h1>

<h1>Second div h1</h1>

</div>

<h1>xyz</h1>

</body>

<script src="JqueryDemo.js"></script>

</html>

jquery:

$( "div > h1" ).css("background", "#0686c9");

output:

It is best practice to use jquery code or jquery external file to the bottom of the page.

2. Set the background color of a page to red.

html:

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Set the background color of a page to red</title>

</head>

<body>

<p>Set the background color of the page to red</p>

</body>

<script>

$(document.body).css("background", "red");

</script>

</html>

output:

3. Hide all the input elements within a form.

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Hide all the input elements within a form</title>

</head>

<body>

<form name='demo_form'>

First name: <input type="text" name="fname"><br>

Last name: <input type="text" name="lname"><br>

<input type="submit" value="Submit">

<h1>All the input element is hidden.</h1>

</form>

</body>

<script>

$(demo_form.elements).hide();

</script>

</html>

output:

4. Find the specific option tag text value of a selected option.

html:

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Find the specific option tag text value of a selected option</title>

</head>

<body>

<select id="myselect">

<option value="1">Option-1</option>

<option value="2">Option-2</option>

<option value="3">Option-3</option>

</select>

</body>

<script>

var txt = $("#myselect option[value=2]").text();

console.log(txt);

</script>

</html>

output:

5. Check/uncheck a checkbox input or radio button?

html:

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Check/uncheck a checkbox input or radio button</title>

</head>

<body>

<form action="">

<input type="radio" name="sex" value="male" checked>Male<br>

<input type="radio" name="sex" value="female">Female

</form>

</body>

<script>

$('input:radio[value=female]').prop("checked", true);

</script>

</html>

output:

6. Write jQuery code to append a div element.

html:

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Append a div element (and all of its contents) dynamically to the body element</title>

</head>

<body>

</body>

<script>

$("<div><h1>JQuery Core</h1></div>").appendTo("body");

</script>

</html>

output:

7. Write a jQuery Code to get a single element from a selection.

html:

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Write a jQuery Code to get a single element from a selection</title>

</head>

<body>

<ui>

<li>Html Tutorial</li>

<li>Mongodb Tutorial</li>

<li>Python Tutorial</li>

</body>

<script>

var listItems = $('li');

var rawListItem = listItems[1]; // or listItems.get(0)

var html = rawListItem.innerHTML;

console.log(html);

</script>

</html>

output:

8. Write jQuery Code to add a <b> tag at the beginning of the list item, containing the index of the list item.

html:

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Add a tag at the beginning of the list item</title>

</head>

<body>

<ui>

<li>Html Tutorial</li>

<li>Mongodb Tutorial</li>

<li>Python Tutorial</li>

</body>

<script>

$('li').each(function (index, elem) {

$(elem).prepend('' + index + ': ');

});

</script>

</html>

output:

9. Write jQuery Code to change the hyperlink and the text of a existing link.

html:

<!DOCTYPE html>

<html>

<head>

<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>

<meta charset="utf-8">

<title>Change the hyperlink and the text of a existing link</title>

</head>

<body>

<a href="www.w3resource.com/PostgreSQL/tutorial.php">PostgreSQL Tutorial</a>

</body>

<script>

$("a").attr("href", "www.w3resource.com/mysql/mysql-tutorials.php");

$("a").text("MySQL Tutorial");

</script>

</html>

output:

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