jQuery的淘汰赛自动填充功能不允许选择自定义值

Question

我已阅读this topic如何使用淘汰赛实现自动填充。

我已经开始工作了，但注意到我无法选择我自己的类型值。

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更多描述：我将任何字符串输入到自动完成源中不存在的输入中。因此，该字符串不会被设置为该输入的值。

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ko.bindingHandlers.autoComplete = { 
 
    // Only using init event because the Jquery.UI.AutoComplete widget will take care of the update callbacks 
 
    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) { 
 
     // { selected: mySelectedOptionObservable, options: myArrayOfLabelValuePairs } 
 
     var settings = valueAccessor(); 
 

 
     var selectedOption = settings.selected; 
 
     var options = settings.options; 
 
     var elVal = $(element).val(); 
 

 
     var updateElementValueWithLabel = function (event, ui) { 
 
      // Stop the default behavior 
 
      event.preventDefault(); 
 

 
      // Update the value of the html element with the label 
 
      // of the activated option in the list (ui.item) 
 
      $(element).val(ui.item !== null ? ui.item.label : elVal); 
 

 
      // Update our SelectedOption observable 
 
      if(typeof ui.item !== "undefined") { 
 
       // ui.item - label|value|... 
 
       selectedOption(ui.item); 
 
      } 
 
     }; 
 

 
     $(element).autocomplete({ 
 
      source: options, 
 
      select: function (event, ui) { 
 
       updateElementValueWithLabel(event, ui); 
 
      }, 
 
      focus: function (event, ui) { 
 
       updateElementValueWithLabel(event, ui); 
 
      }, 
 
      change: function (event, ui) { 
 
       updateElementValueWithLabel(event, ui); 
 
      } 
 
     }); 
 
    } 
 
}; 
 

 
// Array with original data 
 
var remoteData = [{ 
 
    name: 'Ernie', 
 
    id: 1 
 
}, { 
 
    name: 'Bert', 
 
    id: 2 
 
}, { 
 
    name: 'Germaine', 
 
    id: 3 
 
}, { 
 
    name: 'Sally', 
 
    id: 4 
 
}, { 
 
    name: 'Daisy', 
 
    id: 5 
 
}, { 
 
    name: 'Peaches', 
 
    id: 6 
 
}]; 
 

 
function ViewModel() { 
 
    var self = this; 
 
    
 
    self.users = remoteData; 
 
    
 
    self.selectedOption = ko.observable(''); 
 
    self.options = self.users.map(function (element) { 
 
     // JQuery.UI.AutoComplete expects label & value properties, but we can add our own 
 
     return { 
 
      label: element.name, 
 
      value: element.id, 
 
      // This way we still have acess to the original object 
 
      object: element 
 
     }; 
 
    }); 
 
} 
 

 
$(function() { 
 
    ko.applyBindings(new ViewModel()); 
 
});

<link href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.css" rel="stylesheet"/> 
 

 
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script> 
 
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script> 
 
<script src="https://rawgit.com/rniemeyer/knockout-jqAutocomplete/master/build/knockout-jqAutocomplete.js"></script> 
 

 
<input type="text" data-bind="autoComplete: { selected: selectedOption, options: options }" /> 
 

 
<!-- Debugging --> 
 
<p data-bind="text: ko.toJSON(selectedOption())"></p>

Answer 1

如果要修改绑定接受不在选项列表中，你需要调整updateElementValueWithLabel不重置元素值值，当一个项目未选中。

ko.bindingHandlers.autoComplete = { 
 
    // Only using init event because the Jquery.UI.AutoComplete widget will take care of the update callbacks 
 
    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) { 
 
     // { selected: mySelectedOptionObservable, options: myArrayOfLabelValuePairs } 
 
     var settings = valueAccessor(); 
 

 
     var selectedOption = settings.selected; 
 
     var options = settings.options; 
 
     var elVal = $(element).val(); 
 

 
     var updateElementValueWithLabel = function (event, ui) { 
 
      // Stop the default behavior 
 
      event.preventDefault(); 
 

 
      // Update our SelectedOption observable 
 
      if(ui.item) { 
 
       // Update the value of the html element with the label 
 
       // of the activated option in the list (ui.item) 
 
       // ui.item - label|value|... 
 
       $(element).val(ui.item.label); 
 
       selectedOption(ui.item.label); 
 
      }else{ 
 
      \t \t selectedOption($(element).val()); 
 
      } 
 
     }; 
 

 
     $(element).autocomplete({ 
 
      source: options, 
 
      select: function (event, ui) { 
 
       updateElementValueWithLabel(event, ui); 
 
      }, 
 
      change: function (event, ui) { 
 
       updateElementValueWithLabel(event, ui); 
 
      } 
 
     }); 
 
    } 
 
}; 
 

 
// Array with original data 
 
var remoteData = [{ 
 
    name: 'Ernie', 
 
    id: 1 
 
}, { 
 
    name: 'Bert', 
 
    id: 2 
 
}, { 
 
    name: 'Germaine', 
 
    id: 3 
 
}, { 
 
    name: 'Sally', 
 
    id: 4 
 
}, { 
 
    name: 'Daisy', 
 
    id: 5 
 
}, { 
 
    name: 'Peaches', 
 
    id: 6 
 
}]; 
 

 
function ViewModel() { 
 
    var self = this; 
 
    
 
    self.users = remoteData; 
 
    
 
    self.selectedOption = ko.observable(''); 
 
    self.options = self.users.map(function (element) { 
 
     // JQuery.UI.AutoComplete expects label & value properties, but we can add our own 
 
     return { 
 
      label: element.name, 
 
      value: element.id, 
 
      // This way we still have acess to the original object 
 
      object: element 
 
     }; 
 
    }); 
 
} 
 

 
$(function() { 
 
    ko.applyBindings(new ViewModel()); 
 
});

<link href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.css" rel="stylesheet"/> 
 

 
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script> 
 
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script> 
 
<script src="https://rawgit.com/rniemeyer/knockout-jqAutocomplete/master/build/knockout-jqAutocomplete.js"></script> 
 

 
<input type="text" data-bind="autoComplete: { selected: selectedOption, options: options }" /> 
 

 
<!-- Debugging --> 
 
<p data-bind="text: ko.toJSON(selectedOption())"></p>