我有一组复选框,并且使用基因敲入以以下方式实现了所有复选框。我需要在页面加载上默认检查"选择所有"复选框。
$(document).ready(function(){
viewModel=new model(ko,$);
ko.applyBindings(viewModel);
});
function model(ko,$){
var jsonResponse= $.parseJSON(response);
this.factors=ko.observableArray(jsonResponse["factors"]);
this.selectedFactors=ko.observableArray();
this.selectAll = ko.dependentObservable({
read: function() {
return this.selectedFactors().length === this.factors().length;
},
write: function(newValue) {
this.selectedFactors(this.selectedFactors().length === this.factors().length ? [] : this.factors().slice(0));
},
owner: this
});
}
html:
<table>
<tr>
<td><input type="checkbox" id="selectAll" data-bind="checked: selectAll" />Select All</td>
</tr>
</table>
<table data-bind="foreach: factorsSplitJsonArray">
<tr data-bind="foreach: $data">
<td>
<!-- ko if: $data.hasOwnProperty("factorCode") -->
<input type="checkbox" class="jqFactors" id="jqFactors" data-bind="checkedValue: $data, checked: $root.selectedFactors" />
<span data-bind="text: factorDescription"></span>
<!-- /ko -->
</td>
</tr>
</table>
当我选择或取消选择任何复选框或SelectAll复选框时,ObservableArray IE SelectedFactor会更改。现在,我需要在页面加载上默认选择"所有选择"复选框,并且所选的Factors还应在其中选择所有选定的因素。
我是淘汰赛的新手,无法找到如何使用淘汰赛实施此淘汰赛。如果我们以某种方式将函数称为Selectall,该怎么办,它可以完成工作吗?我如何称呼ko.sportententobservable函数。有人可以帮我吗?
以下是一种有些不同的方法:
var jsonData = {
allFactors: [
{ code: "A1", desc: "Alpha one" },
{ code: "A2", desc: "Alpha two" },
{ code: "B1", desc: "Beta one" },
],
// Simulate that no selection was ever made
selectedFactors: null // or "undefined"
// Unomment this version instead if you want to simulate loading
// data that was previously selected:
//selectedFactors: ["A1", "B1"]
};
function ViewModel(data){
var self = this;
self.factors = ko.observableArray(data.allFactors);
function getAllCodes() {
return data.allFactors.map(function(f) { return f.code; });
}
self.selectedFactors = ko.observableArray(
data.selectedFactors || getAllCodes()
);
self.selectAll = ko.computed({
read: function() {
return self.selectedFactors().length === self.factors().length;
},
write: function(newVal) {
if (newVal === self.selectAll()) return;
if (!!newVal) self.selectedFactors(getAllCodes());
if (!newVal) self.selectedFactors([]);
}
});
}
ko.applyBindings(new ViewModel(jsonData));
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<label><input type="checkbox" data-bind="checked: selectAll"> Select All</label>
<hr>
<ul data-bind="foreach: factors">
<li>
<label>
<input type="checkbox" data-bind="checkedValue: code, checked: $root.selectedFactors">
<span data-bind="text: desc"></span>
</label>
</li>
</ul>