Add EFFECTS Slide (vertical)

EFFECTS-Slide-%28vertical%29.md

@@ -0,0 +1,91 @@
+
+* [`slideDown`](#usage-slideDown) | [`slideUp`](#usage-slideUp) | [`slideToggleBox`](#usage-slideToggleBox)
+
+---
+
+## <a id="usage-slideDown"></a>.slideDown
+
+**Description**
+Display the matched elements with a sliding motion (expanding height downwards).
+
+**Parameters**
+* `options` (Object, optional): Animation options.
+  * `duration` (Number): Duration in milliseconds (default is 300).
+  * `displayType` (String): The CSS display value to set before sliding (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 that slightly overshoots the target height for a spring effect.
+
+**Returns**
+* (jBase): Current instance.
+
+**Example**
+```javascript
+// Reveal a dropdown menu
+$('.dropdown-menu').slideDown({ duration: 200 });
+
+// 1. Shorthand syntax (Number)
+$('.dropdown-content').slideDown(400);
+
+// 2. Custom display type and bounce
+$('.accordion-panel').slideDown({ 
+    duration: 500, 
+    displayType: 'flex', 
+    bounce: true 
+});
+```
+
+---
+
+## <a id="usage-slideUp"></a>.slideUp
+
+**Description**
+Hide the matched elements with a sliding motion (collapsing height upwards).
+
+**Parameters**
+* `options` (Object, optional): Animation options.
+  * `duration` (Number): Duration in milliseconds (default is 300).
+  * `easing` (String): CSS transition timing function.
+  * `bounce` (Boolean): If set to true, the element slightly expands before collapsing.
+
+**Returns**
+  * (jBase): Current instance.
+
+**Example**
+```javascript
+$('.dropdown-menu').slideUp({ duration: 200 });
+
+// 1. Shorthand syntax (Number)
+$('.alert-box').slideUp(300);
+
+// 2. Hide with custom easing
+$('.modal-body').slideUp({ 
+    duration: 500, 
+    easing: 'ease-out' 
+});
+```
+
+---
+
+## <a id="usage-slideToggleBox"></a>.slideToggleBox
+
+**Description**
+Display or hide the matched elements with a vertical sliding motion. Ideal for accordions or collapsible boxes.
+
+**Parameters**
+* `options` (Object | Number, optional): Animation options object, or a number representing the duration in milliseconds. Passes these options to either `slideDown` or `slideUp`
+
+**Returns**
+* (jBase): Current instance.
+
+**Example**
+```javascript
+$('.accordion-header').click(function() {
+    // Slide toggle the next element (the body)
+    $(this).next().slideToggleBox({ duration: 300 });
+});
+
+// Toggle an accordion panel with shorthand syntax
+$('.accordion-header').on('click', () => {
+    $(this).next('.accordion-content').slideToggleBox(400);
+});
+```