jQuery - Hotspot

A jQuery plugin for creating Hotspots in an HTML element. This plugin operates in two modes, admin and display. The admin mode enables user to create hotspots on desired HTML elements. The display mode is used for only displaying the hotspots to the end user. The design of the hotspot created are fully customizable. User can add their own CSS class to style the hotspots.

View Demo

Note: Ensures responsiveness with the latest update.

The Setup

npm install jquery-hotspot

Include jquery.hotspot.js at the bottom of the HTML page before the closing body tag. Wrap the HTML element for which the hotspot is to be obtained with another element. Also include the jquery.hotspot.css file to go with some of the default design decisions.

<div id="theElement">
  <img src="theImage.jpg" />
</div>

The plugin instance will be called with theElement.

Note: The CSS property, position for this element should be kept as relative.

#theElement {
  position: relative;
}

Usage - Display mode

The data associated with the hotspots can be passed in directly to the plugin. The data can also be fetched from a backend server by enabling ajax option.

There are three options given for hotspot-interactivity - hover, click and none.

• hover : The data associated with the hotspot will show up on hovering over spot.
• click : The data associated will show up on clicking the spot.
• none : The data will be static and would not be affected by any events.

Basic call with known coordinates:

$('#theElement').hotspot({
  data: [
    { "x":18, "y":38, "Title":"The Title","Message":"Create the Message here" },
    { "x":43, "y":40, "Title":"jQuery Hotspot","Message":"This jQuery Plugin lets you create hotspot to any HTML element." }
  ],
  tag: 'img', //optional (default is img)
  interactivity: "hover", // options : click, none (default is hover)
  hotspotClass: 'Hotspot'
});

The data object above can be populated with any number of properties and can be designed with appropriate CSS. The tag variable passed to the plugin determines the type of HTML tag for which the hotspot is obtained. The hotspotClass is class of the hotspots created. One can change the look of the hotspot by applying some CSS to this class.

By default in display mode, repositioning of hotspots on window resize is enabled. To disable this, a parameter can be passed in the plugin options.

listenOnResize: false

Fetching data via AJAX call

$("#theElement").hotspot({
  ajax: true, // Switching on the ajax
  ajaxOptions: {
    url: '/hotspots',
    type: 'GET',
    ...
  },
  interactivity: "hover" // options : click, none (default is hover)
});

The data coming from the server-side is expected to be JSON encoded. The object ajaxOptions can be utilized to change the http headers, etc.

Usage - Admin mode

Standard call

$("#theElement").hotspot({
  mode: "admin", // Switching to admin mode
  ajax: true, // Turn on ajax
  ajaxOptions: {
    url: '/hotspots',
    type: 'POST',
    ...
  },
  interactivity: "hover" // options : click, none (default is hover)
});

ajax and ajaxOptions are required here so that the hotspot that are being created in the admin mode get stored in the server. However if someone turn off the ajax, then the hotspots data gets stored in the browser's LocalStorage.

Key Features

1. Any number of messages/nodes can be stuffed in a single hotspot. To do so the schema parameter is passed to the plugin. By default there are two nodes (Title and Message)

$("#theElement").hotspot({
  mode: "admin", // Switching to admin mode
  ajax: true, // Turn on ajax
  ajaxOptions: {
    url: '/hotspots',
    type: 'POST',
    ...
  },
  schema: [
    {
      'property': 'Time',
      'default': '5:40am'
    },
    {
      'property': 'Date',
      'default': '12/11/2018'
    },
    {
      'property': 'Place',
      'default': 'Siberia'
    },
  ]
});

The default property in the schema object above will be overwritten everytime a new hotspot is created.

2. The plugin also provides some basic functions that can be invoked after certain events in the process of creation of hotspots.

$("#theElement").hotspot({
  mode: "admin", // Switching to admin mode
  ajax: true, // Turn on ajax
  ajaxOptions: {
    url: '/hotspots',
    type: 'POST',
    ...
  },
  afterSave: function(err, data) {
    // hotspots `data` in json format can be stored
    //  & passed in `display` mode for the image
  },
  afterRemove: function(err, message) {
    // `message` from the plugin
  },
  afterSend: function(error, message) {
    // check if any `error` has occurred
  }
});

These functions can be utilized to keep track of the flow of hotspot creation.

3. The plugin can be used with any number of HTML elements in a page. However to do so, the LS_Variable passed to the plugin should be named uniquely for every instance. This helps plugin to avoid conflicts and while using HTML5 LocalStorage.

HTML :

<div id="theElement-a">
  <img src="theImage-a.jpg" />
</div>
<div id="theElement-b">
  <img src="theImage-b.jpg" />
</div>

JavaScript :

$("#theElement-a").hotspot({
  mode: "admin",
  ...
  LS_Variable: "HotspotPlugin-a"
});

$("#theElement-b").hotspot({
  mode: "admin",
    ...
  LS_Variable: "HotspotPlugin-b"
});

For better clarity the examples folder can be checked

Fetch data via AJAX Request

Include jquery and hotspot plugin in the html code.

<script type="text/javascript">
$.ajax({url: "mytest.aspx/GetHotSpotData", success: function (result) {
  $("#HotspotPlugin_image").hotspot({
    data: result,
    interactivity: "click",
  });
}});
</script>

Also make sure result passed as data in the plugin should be an array of objects.

[
  { "x":18, "y":29, "Title":"The Title","Message":"Create the Message here" },
  { "x":14, "y":40, "Title":"jQuery Hotspot","Message":"This jQuery Plugin lets you create hotspot to any HTML element." }
]