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E-Gallery

Introduction

E-Gallery is a jQuery-powered, customizable, reactive image gallery library made by Elementor.

Main Features

  • Fully responsive and reactive - reorganizes and resizes images on viewport changes (e.g., on window resize)
  • Includes three different responsive layouts: grid, justified and masonry
  • Filterable by image tags
  • Lightweight - Only 14.7KB minified JS+CSS (5KB gzipped)
  • Highly performant - most calculations are done with CSS
  • Customizable number of columns
  • Customizable row and column spacing
  • Support for custom breakpoints

Setup

  1. Clone this repository.
  2. In your local repo folder, run npm install.
  3. Once installation is complete, run npm run build for production deployment, or npm run dev for a development version.
  4. In the newly-created dist folder, you will find two subfolders: js and css. These folders will contain both regular and minified versions of the e-gallery.js and e-gallery.css files.
  5. The dist folder also includes a jquery-e-gallery.js file, which turns the gallery into a jQuery plugin. If you wish to use the gallery as a jQuery plugin, use this file instead of the e-gallery.js file.
  6. If you already have jQuery in your project, those are the only files you must include in your own project for the gallery to work. If you don't have jQuery in your project, you should include it (before the e-gallery.js file, since jQuery is a dependency of E-Gallery.

Usage

Initialization

The gallery is initialized by instantiating a new eGallery object, and passing it an options object:

new EGallery( {options} );.

Passing the images to the gallery can be done in two different ways: Passing an array of "image" objects to the library in the options object Using HTML markup, which the library will scan and use.

1. Passing an array of images to the options object

To use the gallery, you need a single empty container <div> element, which you pass in to the options object, as the container property. The container property can receive either a reference to the container DOM element, a jQuery instance of the element, or a jQuery selector for the element (if it has a class or id attribute, for example).

In the following example, a <div> container element is used. The element's jQuery selector is passed into the container property:

<body>
	<div id="gallery-container"></div>
	<script>
	new EGallery( {
		container: '#gallery-container',
		items: [
			{
			  thumbnail: 'image/path/image1.jpg'
			},
			{ 
			  thumbnail: 'image/path/image2.jpg' 
			},
			{ 
			  thumbnail: 'image/path/image3.jpg' 
			},
			{ 
			  thumbnail: 'image/path/image4.jpg' 
			},
		],
	} );
	</script>
</body>

Passing the items property in the options object is mandatory in this use case. items must receive an array of objects (representing images), each with a thumbnail property pointing to the image's file path.

2. Using HTML markup

The E-Gallery library can read HTML markup and use it to construct the gallery. The gallery's basic element hierarchy:

  • Container
    • Item (default selector: .e-gallery-item)
      • Image (default selector: .e-gallery-image)

There are two ways to use HTML markup to pass items to the E-Gallery library:

  1. Adding the library's default element class names to your HTML markup
  2. Overwriting the gallery's jQuery selectors with your own selectors

1. Example markup using the library's default class names:

<body>
	<div id="gallery-container">
		<div class="e-gallery-item">
			<div class="e-gallery-image" style="background-image: url("/images/1.png")"></div>
		</div>
		<div class="e-gallery-item">
			<div class="e-gallery-image" style="background-image: url("/images/2.png")"></div>
		</div>
		<div class="e-gallery-item">
			<div class="e-gallery-image" style="background-image: url("/images/3.png")"></div>
		</div>
		<div class="e-gallery-item">
			<div class="e-gallery-image" style="background-image: url("/images/4.png")"></div>
		</div>
	</div>
	<script>
	new EGallery( { container: '#gallery-container' } );
	</script>
</body>

It doesn't matter if the item and image elements have additional classes and attributes, as long as they have the E-Gallery-defined selectors.

2. Overwriting the library's selectors:

new EGallery( {
	container: '#gallery-container',
	selectors: {
		items: 'your-item-selector-here',
		image: 'your-image-selector-here',
	}
} );

The values passed to the items and image properties can be any valid jQuery selectors. You should only change the jQuery selectors if you use your own HTML markup for the gallery.

Options

Option Property Description Variable Type Default Value Is Updatable
container The gallery's container element string null no
type Type of Gallery. Available types: 'grid', 'justified', 'masonry' string 'grid' no
horizontalGap The spacing between gallery columns number 5
(for responsive settings, see the Breakpoints sub-section)		 yes
verticalGap The spacing between gallery rows number 5
(for responsive settings, see the Breakpoints sub-section)		 yes
columns Number of columns in the gallery. Only available in "Grid" and "Masonry" type galleries number 5
(for responsive settings, see the Breakpoints sub-section)		 yes
breakpoints Settings for custom breakpoints. Settings that can be configured for different breakpoints: horizontalGap, verticalGap, columns object see the Breakpoints sub-section yes
tags A comma-separated list of tags attached to image elements. These tags allow real-time filtering of gallery images by tag string null yes
aspectRatio In "Grid" type galleries, the aspect ratio set for the gallery images string '16:9' yes
idealRowHeight In "Justified" type galleries, this variable determines a height (in pixels) to which the library will aim to adjust the row height when positioning the gallery images number 200 yes
lastRow In "Justified" type galleries, this parameter determines how images are rendered in the last row of the gallery. Options are 'normal' (renders images with the same height as other rows), 'hide' (does not display the last row), and 'fit' (divides the row width between the last row's images. This option might result in much larger image sizes than the rest of the gallery) string 'normal' yes
animationDuration The duration of the animation for transition effects, such as the gallery's auto-realignment on resize number 0.3s yes
classes The duration of the animation for transition effects, such as the gallery's auto-realignment on resize object see the Classes sub-section no
selectors The duration of the animation for transition effects, such as the gallery's auto-realignment on resize object { items: '.e-gallery-item', image: 'e-gallery-image' } no
classesPrefix A string prefix to gallery element classes. This parameter is not used when HTML markup is used to pass images to the gallery string 'e-gallery-' no
Breakpoints (settings property)

The breakpoints parameter accepts an object, in which each breakpoint (in pixels) is a key pointing to a nested object. The breakpoints object can adjust the values of the horizontalGap, verticalGap and columns settings.

The following example shows the breakpoints object's default values:

new EGallery( {
	container: '#gallery-container',
	breakpoints: {
		1024: {
			horizontalGap: 5,
			verticalGap: 5,
			columns: 4,
		},
		768: {
			horizontalGap: 1,
			verticalGap: 1,
			columns: 2,
		},
	}
} );
Classes (settings property)

Default values of the classes property object:

{
  container: 'container',
  item: 'item',
  image: 'image',
  overlay: 'overlay',
  overlayTitle: 'overlay__title',
  overlayDescription: 'overlay__description',
  link: 'link',
  firstRowItem: 'first-row-item',
  animated: '-animated',
}

Methods

Method Description
setSettings( key, value ) Updates the setting passed as the key parameter with the value specified in the value parameter, and reruns the gallery with the new setting*
runGallery() Runs (or re-runs) the gallery setup (not including markup building).
getCurrentBreakpoint() Returns the breakpoint currently used by the gallery
getActiveItems() Returns the currently displayed items

* See the "Options" section above for information on which settings can be updated

The jQuery Plugin

To use E-Gallery as a jQuery plugin, include the jquery-e-gallery.js file in your project in place of the e-gallery.js file.

Usage

Call the .eGallery() method on the gallery container's jQuery object, passing in the options object:

<body>
	<div id="#gallery-container"></div>
	<script>
	jQuery( '#gallery-container' ).eGallery( {options} );
	</script>
</body>

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Nov 18, 2019

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