README.markdown

infiniScroll.js

infiniScroll.js is a Backbone.js module to add infinite scrolling to your backbone views. Simply create an InfiniScroll object passing the desired collection and success callback.

Usage

###Backbone.InfiniScroll(collection, options)

Instantiate a new InfiniScroll object after your Backbone view has been rendered.

myView = Backbone.View.extend({
  initialize: function(){
    _.bindAll(this, "render");

    this.render();
    this.infiniScroll = new Backbone.InfiniScroll(this.collection, {success: this.appendRender});
  }
)};

methods

• destroy() - Removes target scroll binding. Call this when you're removing the view.
• enableFetch() - Enables infiniScroll
• disableFetch() - Disables infiniScroll

Options

options = {
  success: function(){ },
  error: function(){ },
  target: $(window),
  param: "until",
  extraParams: {},
  pageSizeParam: "page_size",
  untilAttr: "id",
  pageSize: collection.length,
  scrollOffset: 100,
  add: true,
  strict: false,
  includePage: false
}

• success - Success callback function called when collection.fetch is successful
• error - Error callback function called when collection.fetch raises error
• target - Target element to watch scroll. Change this if you have an internal scrolling element to infinite scroll.
• param - GET param used when collection.fetch is called
• extraParams - extra GET params used when collection.fetch is called
• untilAttr - The GET param attribute used when collection.fetch is called. Finds last record in collection and uses this param as key. Can be a function name on the model, which can be used as a computed property.
• pageSize - Used internally to determine when fetching of pages is completed.
• pageSizeParam - GET param used to send page size when collection.fetch is called.
• scrollOffset - Pixel count from bottom of page to offset the scroll for when to trigger collection.fetch
• add - Passed to collection fetch to either add new records to the collection of perform a normal reset
• strict - Used to determine when to stop fetching. Setting strict on will fetch until the response size is less than the page size (This can save one extra request being made to the server, but requires the response size to be consistent). Setting strict off will fetch until the response length is equal to 0 (better for varying page size responses).
• includePage - Boolean to include the next page in the query params eg. "&page=2".