jQuery Examples

Last modified on: December 8, 2024

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<h3>jQuery Examples: Hands-On Solutions for Web Development</h3>
<p>The best way to understand jQuery is through practical examples. These examples cover a wide range of common tasks, from DOM manipulation to event handling, effects, and AJAX. Each example is crafted to provide a clear understanding of how jQuery can simplify complex operations.</p>
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<h3><strong>Basic jQuery Example</strong></h3>
<h4>Example: Changing Text Content</h4>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;jQuery Change Text&lt;/title&gt;
    &lt;script src="https://code.jquery.com/jquery-3.6.0.min.js"&gt;&lt;/script&gt;
    &lt;script&gt;
        $(document).ready(function () {
            $('#btnChangeText').click(function () {
                $('#exampleText').text('Hello, jQuery!');
            });
        });
    &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;p id="exampleText"&gt;Click the button to change this text.&lt;/p&gt;
    &lt;button id="btnChangeText"&gt;Change Text&lt;/button&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3><strong>jQuery Selectors</strong></h3>
<h4>Example: Highlight All Paragraphs</h4>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;jQuery Selectors&lt;/title&gt;
    &lt;script src="https://code.jquery.com/jquery-3.6.0.min.js"&gt;&lt;/script&gt;
    &lt;script&gt;
        $(document).ready(function () {
            $('p').css('background-color', 'yellow');
        });
    &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;p&gt;Paragraph 1&lt;/p&gt;
    &lt;p&gt;Paragraph 2&lt;/p&gt;
    &lt;p&gt;Paragraph 3&lt;/p&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3><strong>jQuery Events</strong></h3>
<h4>Example: Mouseover and Mouseout Events</h4>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;jQuery Events&lt;/title&gt;
    &lt;script src="https://code.jquery.com/jquery-3.6.0.min.js"&gt;&lt;/script&gt;
    &lt;script&gt;
        $(document).ready(function () {
            $('#hoverDiv').mouseover(function () {
                $(this).css('background-color', 'green');
            }).mouseout(function () {
                $(this).css('background-color', 'red');
            });
        });
    &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;div id="hoverDiv" style="width: 100px; height: 100px; background-color: red;"&gt;&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3><strong>jQuery Effects</strong></h3>
<h4>Example: Fade In and Fade Out</h4>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;jQuery Effects&lt;/title&gt;
    &lt;script src="https://code.jquery.com/jquery-3.6.0.min.js"&gt;&lt;/script&gt;
    &lt;script&gt;
        $(document).ready(function () {
            $('#btnFadeToggle').click(function () {
                $('#box').fadeToggle();
            });
        });
    &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;button id="btnFadeToggle"&gt;Fade Toggle&lt;/button&gt;
    &lt;div id="box" style="width: 100px; height: 100px; background-color: blue; margin-top: 10px;"&gt;&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3><strong>jQuery AJAX</strong></h3>
<h4>Example: Load Data from a Server</h4>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;jQuery AJAX Example&lt;/title&gt;
    &lt;script src="https://code.jquery.com/jquery-3.6.0.min.js"&gt;&lt;/script&gt;
    &lt;script&gt;
        $(document).ready(function () {
            $('#btnLoad').click(function () {
                $('#content').load('https://jsonplaceholder.typicode.com/posts/1', function (response) {
                    $('#content').text(response);
                });
            });
        });
    &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;button id="btnLoad"&gt;Load Content&lt;/button&gt;
    &lt;div id="content" style="margin-top: 10px;"&gt;&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3><strong>Chaining Methods</strong></h3>
<h4>Example: Apply Multiple Effects</h4>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;jQuery Chaining&lt;/title&gt;
    &lt;script src="https://code.jquery.com/jquery-3.6.0.min.js"&gt;&lt;/script&gt;
    &lt;script&gt;
        $(document).ready(function () {
            $('#btnChain').click(function () {
                $('#chainBox').slideUp(1000).slideDown(1000).fadeOut(1000).fadeIn(1000);
            });
        });
    &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;button id="btnChain"&gt;Start Chain&lt;/button&gt;
    &lt;div id="chainBox" style="width: 100px; height: 100px; background-color: orange; margin-top: 10px;"&gt;&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3><strong>Form Validation</strong></h3>
<h4>Example: Validate Required Fields</h4>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;jQuery Form Validation&lt;/title&gt;
    &lt;script src="https://code.jquery.com/jquery-3.6.0.min.js"&gt;&lt;/script&gt;
    &lt;script&gt;
        $(document).ready(function () {
            $('#btnSubmit').click(function (e) {
                if ($('#name').val() === '') {
                    e.preventDefault();
                    alert('Name is required!');
                }
            });
        });
    &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;form&gt;
        &lt;label for="name"&gt;Name:&lt;/label&gt;
        &lt;input type="text" id="name" name="name"&gt;
        &lt;button type="submit" id="btnSubmit"&gt;Submit&lt;/button&gt;
    &lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3><strong>Best Practices with jQuery Examples</strong></h3>
<ol>
<li><strong>Keep Code DRY</strong>: Use reusable functions where possible.</li>
<li><strong>Optimize Selectors</strong>: Use specific selectors to improve performance.</li>
<li><strong>Handle Errors Gracefully</strong>: Include error handling in AJAX requests.</li>
<li><strong>Chain Methods When Possible</strong>: Minimize repetitive code by chaining methods.</li>
</ol>
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<h3>&nbsp;</h3>
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