1

In this example i'm expecting it to say "hello world" but the world isn't picked up from the saying attribute.

(function () {
    'use strict';

    $(function () {
        // Set up a route that maps to the `filter` attribute
        can.route(':filter');

        // Render #app-template
        $('#app').html(can.view('appTemplate', {}));

        // Start the router
        can.route.ready();
    });

    can.Component.extend({
        tag: "say",
        scope: {
            saying: function(){
                return this.attr('saying')
            },
            greeting: 'salutations'
        },
        template: can.view("sayTemplate")
    });

})();

Templates:

<div id="app"></div>

<script id="appTemplate" type="text/mustache">
  <b>Hello</b>
  <say saying="world"></say>
</script>

<script id="sayTemplate" type="text/mustache">
    <b>{{saying}}.</b> <i>{{greeting}}</i>
</script>
4

1 回答 1

0

您需要告诉组件您要访问属性纯值，如下所示：

can.Component.extend({
  tag: "app-say",
  scope: {
    saying: '@',
    greeting: 'salutations'
  },
  template: can.view("sayTemplate")
});

看到这个小提琴。您最终可能想要使用应用程序状态中的可观察属性而不是纯字符串值。这可能看起来像：

var appState = new can.Map({
    name: 'World'
});

$(function () {
    // Set up a route that maps to the `filter` attribute
    can.route(':filter');

    // Render #app-template
    $('#app').html(can.view('appTemplate', appState));

    // Start the router
    can.route.ready();
});

can.Component.extend({
    tag: "app-say",
    scope: {
        greeting: 'salutations'
    },
    template: can.view("sayTemplate")
});

还有一个像这样的模板：

<div id="app"></div>

<script id="appTemplate" type="text/mustache">
  <b>Hello</b>
  <app-say saying="{name}"></app-say>
  <div><input type="text" can-value="name"></div>
</script>

<script id="sayTemplate" type="text/mustache">
    <b>{{saying}}.</b> <i>{{greeting}}</i>
</script>

这也会创建一个交叉绑定输入字段，每当您更新文本字段时，该字段都会在任何地方更新名称。小提琴在这里。

于 2014-09-09T21:22:59.780 回答