模板

渲染命名模板

如果使用数据流绑定，比如(foreach, with, if)不需要使用命名模板，自动隐含
但是也可以命名的方式使用模板

<h2>Participants</h2>
Here are the participants:
<div data-bind="template: { name: 'person-template', data: buyer }"></div>
<div data-bind="template: { name: 'person-template', data: seller }"></div>
 
<script type="text/html" id="person-template">
    <h3 data-bind="text: name"></h3>
    <p>Credits: <span data-bind="text: credits"></span></p>
</script>
 
<script type="text/javascript">
     function MyViewModel() {
         this.buyer = { name: 'Franklin', credits: 250 };
         this.seller = { name: 'Mario', credits: 5800 };
     }
     ko.applyBindings(new MyViewModel());
</script>

foreach使用命名

<h2>Participants</h2>
Here are the participants:
<div data-bind="template: { name: 'person-template', foreach: people }"></div>
 
<script type="text/html" id="person-template">
    <h3 data-bind="text: name"></h3>
    <p>Credits: <span data-bind="text: credits"></span></p>
</script>
 
 function MyViewModel() {
     this.people = [
         { name: 'Franklin', credits: 250 },
         { name: 'Mario', credits: 5800 }
     ]
 }
 ko.applyBindings(new MyViewModel());

使用as别名

<ul data-bind="template: { name: 'employeeTemplate',
                                  foreach: employees,
                                  as: 'employee' }"></ul>

<ul data-bind="template: { name: 'seasonTemplate', foreach: seasons, as: 'season' }"></ul>
 
<script type="text/html" id="seasonTemplate">
    <li>
        <strong data-bind="text: name"></strong>
        <ul data-bind="template: { name: 'monthTemplate', foreach: months, as: 'month' }"></ul>
    </li>
</script>
 
<script type="text/html" id="monthTemplate">
    <li>
        <span data-bind="text: month"></span>
        is in
        <span data-bind="text: season.name"></span>
    </li>
</script>
 
<script>
    var viewModel = {
        seasons: ko.observableArray([
            { name: 'Spring', months: [ 'March', 'April', 'May' ] },
            { name: 'Summer', months: [ 'June', 'July', 'August' ] },
            { name: 'Autumn', months: [ 'September', 'October', 'November' ] },
            { name: 'Winter', months: [ 'December', 'January', 'February' ] }
        ])
    };
    ko.applyBindings(viewModel);
</script>

使用afterRender/afterAdd/beforeRemove

在afterRender的地方添加后期处理函数

<div data-bind='template: { name: "personTemplate",
                            data: myData,
                            afterRender: myPostProcessingLogic }'> </

viewModel.myPostProcessingLogic = function(elements) {
    // "elements" is an array of DOM nodes just rendered by the template
    // You can add custom post-processing logic here
}

动态选择使用的模板

可以使用name选项，选择模板
也可以传入一个回调函数，决定使用哪个模板

使用foreach，Knockout会评估array中的每个item

<ul data-bind='template: { name: displayMode,
                           foreach: employees }'> </ul>
 
<script>
    var viewModel = {
        employees: ko.observableArray([
            { name: "Kari", active: ko.observable(true) },
            { name: "Brynn", active: ko.observable(false) },
            { name: "Nora", active: ko.observable(false) }
        ]),
        displayMode: function(employee) {
            // Initially "Kari" uses the "active" template, while the others use "inactive"
            return employee.active() ? "active" : "inactive";
        }
    };
 
    // ... then later ...
    viewModel.employees()[1].active(true); // Now "Brynn" is also rendered using the "active" template.
</script>

可以传入两个参数,第二个是绑定上下文

displayMode: function(employee, bindingContext) {
    // Now return a template name string based on properties of employee or bindingContext
}

使用 jQuery.tmpl

需要引入库

<!-- First jQuery -->     <script src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
<!-- Then jQuery.tmpl --> <script src="jquery.tmpl.js"></script>
<!-- Then Knockout -->    <script src="knockout-x.y.z.js"></script>

然后可以用jQuery.tmpl语法

<h1>People</h1>
<div data-bind="template: 'peopleList'"></div>
 
<script type="text/html" id="peopleList">
    {{each people}}
        <p>
            <b>${name}</b> is ${age} years old
        </p>
    {{/each}}
</script>
 
<script type="text/javascript">
    var viewModel = {
        people: ko.observableArray([
            { name: 'Rod', age: 123 },
            { name: 'Jane', age: 125 },
        ])
    }
    ko.applyBindings(viewModel);
</script>

因为{{each ...}}\${ ... }都是jQuery.tmpl语法，但是不建议使用

使用Underscore.js

使用ERB-style风格的分隔符

<script type="text/html" id="peopleList">
    <% _.each(people(), function(person) { %>
        <li>
            <b><%= person.name %></b> is <%= person.age %> years old
        </li>
    <% }) %>
</script>