backbone.js的无尽/无限滚动类型解决方案

Question

我与backbone.js一起玩耍，我想知道是否有更简洁的解决方案来创建模型/集合的“无限滚动”情况，而不是模块I一直在看（有几个jQuery，可能更适合其他库）。我想我会在尝试构建我自己的骨干解决方案，如果它应该在骨干集合之外构建的东西，或者如果有人尝试过类似的东西之前，会问一些搜索。

Answer 1

这blog post最近登陆我的twitter流。看起来像一个非常好的解决方案，并在main page上运行良好。在博客中，该解决方案的好处是：

1. 保留后退按钮。
2. 不管使用hashbang，不管twitter工程师有多开心。
3. 如果（1）不可能，就可以无限滚动。
4. 渐进式增强：当（3）发生时，用户会遵循良好的超链接获取更多内容。

Answer 2

，如果你还没有尝试过SlickGrid可能是一个选项：https://github.com/mleibman/SlickGrid/wiki/Examples

Answer 3

我发现了另外两种资源，同时研究这个自己：

1. https://github.com/joneath/infiniScroll.js
2. http://addyosmani.com/blog/backbone-paginator-new-pagination-components-for-backbone-js/

Answer 4

与骨干和jQuery路点的另一个解决方案：https://gist.github.com/davidmontoyago/6336612

Answer 5

以下扩展应该工作： https://github.com/joneath/infiniScroll.js

这些也可能是有用的，以部分地加载数据： http://backplug.io/plugin/Backbone.actAs.Paginatable， https://github.com/wyuenho/backbone-pageable，https://github.com/backbone-paginator/backbone.paginator。

我更喜欢在这里搜索Backbone扩展：http://backplug.io。

Answer 6

另一个重复的答案：这是我Backbone.Collection的延伸：

_.extend Backbone.Collection.prototype, 
    options: 
    infinitescroll: 
     success: $.noop 
     error: $.noop 
     bufferPx: 40 
     scrollPx: 150 
     page: 
     current: 0 
     per: null 
     state: 
      isDuringAjax: false 
      isDone: false 
      isInvalid: false 
     loading: 
     wrapper: 'backbone-infinitescroll-wrapper' 
     loadingId: 'backbone-infinitescroll-loading' 
     loadingImg: 'loading.gif' 
     loadingMsg: '<em>Loading ...</em>' 
     finishedMsg: '<em>No more</em>' 
     msg: null 
     speed: 'fast' 

    infinitescroll: (options={})-> 
    # NOTE: coffeescript cannot deal with nested scope! 
    that = @ 

    _.extend(@options.infinitescroll, options.infinitescroll) if options.infinitescroll 

    infinitescroll_options = @options.infinitescroll 

    # where we want to place the load message in? 
    infinitescroll_options.loading.wrapper = $(infinitescroll_options.loading.wrapper) 
    if !infinitescroll_options.loading.msg and infinitescroll_options.loading.wrapper.size() > 0 
     infinitescroll_options.loading.msg = $('<div/>', { 
     id: infinitescroll_options.loading.loadingId 
     }).html('<img alt="'+$(infinitescroll_options.loading.loadingMsg).text()+'" src="' + infinitescroll_options.loading.loadingImg + '" /><div>' + infinitescroll_options.loading.loadingMsg + '</div>') 
     infinitescroll_options.loading.msg.appendTo(infinitescroll_options.loading.wrapper).hide() 
    else 
     infinitescroll_options.loading.msg = null 

    fetch_options = _.omit(options, 'infinitescroll') 
    infinitescroll_fetch =()=> 
     # mark the XHR request 
     infinitescroll_options.state.isDuringAjax = true 

     # increase page count 
     infinitescroll_options.page.current++ 

     payload = { 
     page: infinitescroll_options.page.current 
     } 
     payload['limit'] = infinitescroll_options.page.per if infinitescroll_options.page.per isnt null 

     _.extend(fetch_options, { 
     remove: false 
     data: payload 
     }) 

     if infinitescroll_options.loading.msg 
     # preload loading.loadingImg 
     (new Image()).src = infinitescroll_options.loading.loadingImg if infinitescroll_options.loading.loadingImg 

     infinitescroll_options.loading.msg.fadeIn infinitescroll_options.loading.speed,()-> 
      that.fetch(fetch_options) 
      .success (data, state, jqXHR)=> 
      infinitescroll_options.state.isDuringAjax = false 
      infinitescroll_options.state.isDone = true if _.size(data) is 0 

      infinitescroll_options.loading.msg.fadeOut infinitescroll_options.loading.speed,()-> 
       infinitescroll_options.success.call(data, state, jqXHR) if _.isFunction(infinitescroll_options.success) 
       return 
      return 
      .error (data, state, jqXHR)=> 
      infinitescroll_options.state.isDuringAjax = false 
      infinitescroll_options.state.isInvalid = true 

      infinitescroll_options.loading.msg.fadeOut infinitescroll_options.loading.speed,()-> 
       infinitescroll_options.error.call(data, state, jqXHR) if _.isFunction(infinitescroll_options.error) 
       return 
      return 
      return 

     else 
     that.fetch(fetch_options) 
     .success (data, state, jqXHR)=> 
      infinitescroll_options.state.isDuringAjax = false 
      infinitescroll_options.state.isDone = true if _.size(data) is 0 

      infinitescroll_options.success.call(data, state, jqXHR) if _.isFunction(infinitescroll_options.success) 
      return 

     .error (data, state, jqXHR)=> 
      infinitescroll_options.state.isDuringAjax = false 
      infinitescroll_options.state.isInvalid = true 

      infinitescroll_options.error.call(data, state, jqXHR) if _.isFunction(infinitescroll_options.error) 
      return 
     return 

    $(document).scroll()-> 
     $doc = $(document) 
     isNearBottom =()-> 
     bottomPx = 0 + $doc.height() - $doc.scrollTop() - $(window).height() 

     # if distance remaining in the scroll (including buffer) is less than expected? 
     (bottomPx - infinitescroll_options.bufferPx) < infinitescroll_options.scrollPx 

     return if infinitescroll_options.state.isDuringAjax || infinitescroll_options.state.isDone || infinitescroll_options.state.isInvalid || !isNearBottom() 

     infinitescroll_fetch() 
     return 


    infinitescroll_fetch() 
    return 

https://gist.github.com/mcspring/7655861