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+* [`fadeIn` / `show`](#usage-fadeIn) | [`fadeOut` / `hide`](#usage-fadeOut) | [`fadeToggle`](#usage-fadeToggle)
+
+---
+
+## <a id="usage-fadeIn"></a>.fadeIn (Alias: .show)
+
+**Description**
+Display the matched elements by fading them to opaque (opacity: 1).
+
+**Parameters**
+* `options` (Object, optional): Animation options.
+  * `duration` (Number): Animation runtime in milliseconds (default is 300).
+  * `displayType` (String): The CSS display value to set before fading (default is 'block').
+  * `easing` (String): CSS transition timing function (e.g., 'linear', 'ease-in-out').
+  * `bounce` (Boolean): If set to true, applies a dynamic cubic-bezier curve and scale transformation for a spring-like effect.
+
+**Returns**
+* (jBase): Current instance.
+
+**Example**
+```javascript
+// 1. Shorthand syntax (Number)
+$('div.hidden').fadeIn(400);
+
+// 2. Custom display type and easing
+$('.modal').show({ 
+    duration: 600, 
+    displayType: 'flex', 
+    easing: 'linear' 
+});
+
+// 3. The new snappy bounce effect
+$('.alert').fadeIn({ 
+    duration: 500, 
+    bounce: true 
+});
+
+```
+
+---
+
+## <a id="usage-fadeOut"></a>.fadeOut (Alias: .hide)
+
+**Description**
+Hide the matched elements by fading them to transparent (opacity: 0). Once complete, the display property is often set to 'none'.
+
+**Parameters**
+
+* `options` (Object, optional): Animation options.
+  * `duration` (Number, optional): Duration in milliseconds.
+  * `easing` (String): CSS transition timing function (e.g., 'linear', 'ease-in-out').
+  * `bounce` (Boolean): If set to true, applies a spring-like 'back-in' animation before disappearing.
+
+**Returns**
+
+* (jBase): Current instance.
+
+**Example**
+
+```javascript
+$('.alert-box').fadeOut({ duration: 300 });
+
+// 1. Shorthand syntax (Number)
+$('.alert-box').fadeOut(300);
+
+// Use the alias with custom duration
+$('.modal').hide({ duration: 500 });
+
+// 2. Hide with custom easing
+$('.modal').hide({ 
+    duration: 500, 
+    easing: 'ease-out' 
+});
+
+```
+
+---
+
+## <a id="usage-fadeToggle"></a>.fadeToggle (Alias: .toggle)
+
+**Description**
+Display or hide the matched elements by intelligently animating their opacity based on their current computed display state.
+
+**Parameters**
+
+* `options` (Object, optional): Animation options.
+  * `duration` (Object | Number, optional): Animation options object, or a number representing the duration in milliseconds. Passes these options to either `fadeIn` or `fadeOut`.
+
+**Returns**
+
+* (jBase): Current instance.
+
+**Example**
+
+```javascript
+// Toggle visibility on click
+$('#toggle-btn').click(() => {
+    $('.content').fadeToggle({ duration: 200 });
+});
+
+// 1. Simple toggle with shorthand syntax
+$('#toggle-btn').on('click', () => {
+    $('.content').fadeToggle(200);
+});
+
+// 2. Toggle with modern bounce effect
+$('#menu-btn').on('click', () => {
+    $('.dropdown').toggle({ 
+        duration: 400, 
+        bounce: true 
+    });
+});
+
+```
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