新闻 Knockout.js 3.4.0RC 发布，JavaScript 的 UI 库 下载

Knockout.js 3.4.0 RC 发布，此版本更新内容如下：

功能增强

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  #1715 - Add ko.onError handler that provides more consistent error/stack information for async operations and event handlers
  
  
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  #1728 - Include deferred updates functionality in Knockout core
  
  
  • 
    #1738 - Deferred Updates 1 - ko tasks functionality; deferred extender for enabling deferred Updates
    
    
  • 
    #1753 - Deferred Updates 2 - add ability to turn on deferred updates globally by setting ko.options.deferUpdates = true;
    
    
  • 
    #1795 - Deferred Updates 3 - dependency tree scheduling
    
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  #1774 - Add ko.options.useOnlyNativeEvents (default false) that can control if KO uses jQuery (if available) for binding events
  
  
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  #1839 - Performance Improvement - for named templates that use a template or normal element use the element directly as the template to clone
  
  
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  #1840 - Performance Improvement - Make observables 2-3x faster to instantiate and reduce memory usage by 50%
  
  
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  #1841 - Performance Improvement - Make computeds 2x faster to instantiate and reduce memory usage by 50%
  
  
• 
  #1870 - Add ko.isPureComputed.
  

Bug 修复

• 
  #1256 - Better handling when an item is added while a beforeRemove animation is running
  
  
• 
  #1380 - observableArray sort and reverse methods now return the observableArray rather than the underlying array
  
  
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  #1510 - Do not define a custom element when a component name matches a standard element
  
  
• 
  #1591 - Make checked binding work properly with writable computed observables
  
  
• 
  #1613 - IE8 issue with calling .apply with an empty second argument
  
  
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  #1683 - Rearrange code to avoid prototype issue in Opera mobile
  
  
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  #1709 - dontLimitMoves option should be respected when comparing arrays
  
  
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  #1718 - ko.toJS no longer replaces RegExp objects with plain objects
  
  
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  #1756 - Use a hasOwnProperty check when registering components
  
  
• 
  #1781 - Trim string in default css binding
  
  
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  #1783 - Skip template elements when binding
  
  
• 
  #1788 - Fix textInput edge case in IE9
  
  
• 
  #1790 - Remove version from bower.json and don't update it in build
  
  
• 
  #1794 - Exception in an afterAdd callback should not cause duplicate elements
  
  
• 
  #1810 - Don't check for require for CommonJS
  
  
• 
  #1855 - Fix potential memory leak in component binding
  
  
• 
  #1893 - hasFocus fixes in IE
  

下载：

• 
  knockout-3.4.0rc.debug.js
  
  
• 
  knockout-3.4.0rc.js
  
  
• 
  Source code (zip)
  

Knockout 是个JavaScript library，帮助创建丰富的显示和编辑器UI，通过干净的底层数据模型。你可以在任何时候动态更新UI的选择部分。


Knockout.js 3.4.0RC 发布，JavaScript 的 UI 库下载地址