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Knockout simple sorted forEach
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/knockout/3.0.0/knockout-min.js"></script> | |
| <meta charset="utf-8"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <h4>Simple foreach</h4> | |
| <ul data-bind="foreach: names"> | |
| <li>Value: <span data-bind="text: $data"></span></li> | |
| </ul> | |
| <h4>Sorted foreach</h4> | |
| <ul data-bind="foreachSorted: names"> | |
| <li>Value: <span data-bind="text: $data"></span></li> | |
| </ul> | |
| </body> | |
| </html> |
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| ko.bindingHandlers.foreachSorted = { | |
| init : function(element, valueAccessor, allBindings, viewModel, bindingContext) { | |
| var sortedNames = sortObservedArray(valueAccessor); | |
| ko.bindingHandlers.foreach.init(element, function () { return sortedNames; }, allBindings, viewModel, bindingContext); | |
| return {controlsDescendantBindings: true}; | |
| }, | |
| update : function(element, valueAccessor, allBindings, viewModel, bindingContext) { | |
| var sortedNames = sortObservedArray(valueAccessor); | |
| ko.bindingHandlers.foreach.update(element, function () { return sortedNames; }, allBindings, viewModel, bindingContext); | |
| } | |
| }; | |
| function sortObservedArray(valueAccessor) { | |
| var plainArray = ko.utils.unwrapObservable(valueAccessor()); | |
| return plainArray.sort(); | |
| } | |
| function ViewModel() { | |
| this.names = ['gamma 7','beta 5','beta 6','beta 3','alpha', 'delta 44']; | |
| } | |
| ko.applyBindings(new ViewModel()); |
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