Question

您好我有一个问题是创建正确的功能来显示/隐藏元素。单击列表元素时，目标很简单，您将看到包含更多信息的div（模板）。现在，您必须再次单击此相同的列表元素以隐藏此元素。我想做的事：例如，当我单击列表中的第一个元素并显示该元素的模板时，我会转到列表中的第二个元素（或者最后一个或任何其他）我单击它并且我想要隐藏所有打开的元素（模板）但我想只看到我点击的元素的活动元素。现在我可以在同一时间打开许多元素，并且我想将其更改为仅打开的活动元素并隐藏所有其余元素。这可以在knonckout中做到吗？或者也许我必须使用jquery？ jsfiddle

上的示例

HTML

<form action="#"> 
    <input placeholder="Search…" type="search" name="q" data-bind="value: query, valueUpdate: 'keyup'" autocomplete="off"> 
  </form>

  <div class="container">
    <div class="row">
      <div class="col-xs-12 col-sm-6 col-md-4 col-lg-4">
        <ul class="name-list" data-bind="foreach: filteredPeople">
          <li data-bind="attr:{class: $index == 0 ? 'active' : ''}, click: toggleshowMoreInfo" role="button">
            <span class="full-name" data-bind="text: fullName"></span>
          </li>

          <div class="hidden-sm hidden-md hidden-lg" data-bind="slideVisible: showMoreInfo, fadeDuration:600,template: {name: 'person-template'}"></div>
        </ul>

      </div>

      <div class="col-xs-12 col-sm-6 col-md-8 col-lg-8 hidden-xs" data-bind="foreach: filteredPeople">
        <div class="row" data-bind="slideVisible: showMoreInfo, fadeDuration:600,template: {name: 'person-template'}"></div>
      </div>
    </div>
  </div>


  <!-- template for presonal information -->
  <script type="text/html" id="person-template">
    <div class="col-xs-12 col-md-6">
      <p><span data-bind="text: fullName"></span></p>
    </div>
  </script>

JS

var data = [
  {
    "index": 0,
    "name": [{
      "first": "Barlow",
      "last": "Moore"
    }]
  },
  {
    "index": 1,
    "name": [{
      "first": "Valeria",
      "last": "Meadows"
    }]
  },
  {
    "index": 2,
    "name": [{
      "first": "Constance",
      "last": "Singleton"
    }]
  },
  {
    "index": 3,
    "name": [{
      "first": "Wilder",
      "last": "Steele"
    }]
  }
];

  var stringStartsWith = function (startsWith, string) {          
    string = string || "";
    if (startsWith.length > string.length)
        return false;
    return string.substring(0, startsWith.length) === startsWith;
  };

  ko.bindingHandlers.slideVisible = {
    update: function(element, valueAccessor, allBindings) {
      var value = valueAccessor();
      var valueUnwrapped = ko.unwrap(value);
      var duration = allBindings.get('fadeDuration') || 400;
      if (valueUnwrapped == true)
        setTimeout(function(){ $(element).fadeIn(duration); }, duration);
      else
        $(element).fadeOut(duration);
    }
  };

  /* show all data from json */
  function PersonInfo(data) {
    this.firstName = ko.observable(data.name[0].first);
    this.lastName = ko.observable(data.name[0].last);
    this.fullName = ko.computed(function() {
      return this.firstName() + " " + this.lastName();
    }, this);

    this.showMoreInfo = ko.observable(false);
    this.toggleshowMoreInfo = function () {
      this.showMoreInfo(!this.showMoreInfo())
    }
  }

  function PersonInfoViewModel() {
    var self = this;
    self.query = ko.observable('');
    self.mappedPersonalData = $.map(data, function(item) {  
      return new PersonInfo(item) 
    });
    self.filteredPeople = ko.computed(function () {
        return self.mappedPersonalData.filter(function (value) {
            if(self.query() === '' || self.query() === null){
               return true; //no query
            }
            if (stringStartsWith(self.query().toLowerCase(), value.firstName().toLowerCase()) || stringStartsWith(self.query().toLowerCase(), value.lastName().toLowerCase())){
               return true;
            }
            return false;
        });
    }); 
  }

  var viewModel = new PersonInfoViewModel();

  $(document).ready(function() {
    ko.applyBindings(viewModel);
  });

Answer 1

淘汰肯定是可能的。您需要做的就是将切换功能移动到PersonInfoViewModel，并在该循环内部通过其他personInfo模型关闭它们。

self.toggleshowMoreInfo = function (person) {
    var people = self.filteredPeople();
    for(var i=0; i<people.length; i++){
        if(people[i] !== person && people[i].showMoreInfo()){
            people[i].showMoreInfo(false);
        }
    }
    person.showMoreInfo(!person.showMoreInfo());      
}

然后将您的点击绑定更改为$parent.toggleshowMoreInfo

修订jsFiddle

Answer 2

您可以通过使您的单击处理程序设置selectedPerson属性并向模板div添加绑定以将当前person对象与selectedPerson对象进行比较来大大简化此操作。这样，你根本不需要做任何循环。淘汰赛将为您完成所有这一切。 E.g。

<ul data-bind="foreach: filteredPeople">
    <li data-bind="click: toggleSelectedPerson">
        <span class="full-name" data-bind="text: fullName"></span>
    </li>
    <div data-bind="slideVisible: $parent.selectedPerson() === $data, fadeDuration:600,template: {name: 'person-template'}"></div>
</ul>

<div data-bind="foreach: filteredPeople">
    <div data-bind="slideVisible: $parent.selectedPerson() === $data, fadeDuration:600,template: {name: 'person-template'}"></div>
</div>

// your model config
this.selectedPerson = ko.observable(null);
this.toggleSelectedPerson = function (person) {
  this.selectedPerson(this.selectedPerson() === person ? null : person);
}
// your model config continued...

从另一个答案中唠叨并更新了JSFiddle：https://jsfiddle.net/9swam66o/3/

淘汰赛隐藏所有不活跃的元素

2 个答案: