嗨,我正在尝试使用observableArray做foreach,但没有任何结果。

在调试文件时,如javascript文件中的数据将随数组加载。 html代码如下:

<!-- ko foreach: currencyarr -->
    <option data-bind="value:id, text:label"></option>
<!-- /ko -->


JSON文件内容如下:

"name" : "shuvagho",
"curarr" : [
            {"id": "inr", "label": "INR"},
            {"id": "usd", "label": "USD"},
            {"id": "aud", "label": "AUD"},
            {"id": "sgd", "label": "SGD"}
]


使用淘汰赛js的javascript代码如下:

self.currencyarr = ko.observableArray();
self.currencyarr(data.curarr);

最佳答案

您忘记在foreach中使用$ data了。



  var ViewModel = function(){
      var self = this;
      self.currencyarr = ko.observableArray();
      self.currencyarr(data.curarr);
    }
    var data = {
    "name" : "shuvagho",
    "curarr" : [
                {"id": "inr", "label": "INR"},
                {"id": "usd", "label": "USD"},
                {"id": "aud", "label": "AUD"},
                {"id": "sgd", "label": "SGD"}
    ]};

    var viewModel = new ViewModel();

            ko.applyBindings(viewModel);

<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>

<select>
<!--ko foreach: currencyarr-->
  <option data-bind="text:$data.label, value:$data.id" ></option>
<!--/ko-->
</select>





您还可以将选择标签中的选项绑定在一起。



var ViewModel = function(){
  var self = this;
  self.currencyarr = ko.observableArray();
  self.currencyarr(data.curarr);
}
var data = {
"name" : "shuvagho",
"curarr" : [
            {"id": "inr", "label": "INR"},
            {"id": "usd", "label": "USD"},
            {"id": "aud", "label": "AUD"},
            {"id": "sgd", "label": "SGD"}
]};

var viewModel = new ViewModel();

        ko.applyBindings(viewModel);

<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>

<select data-bind="options:$root.currencyarr, optionsText: 'label',optionsValue:'id'"></select>

关于javascript - knockout js observableArray无法正常工作,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/36885544/

10-09 05:30
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