将选项传递给击倒1.3中的模板

本文介绍了将选项传递给击倒1.3中的模板的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

在knockoutjs 1.2.1我能做到：

In knockoutjs 1.2.1 I could do:

<div data-bind="template: {name: 'Bar', foreach: persons, templateOptions:{fooMode: true} }"/>

<script id='Bar'>
    {{if $item.fooMode}} FOO! {{/if}}
</script>

我试图将其翻译为淘汰1.3.0beta

Which I have tried to translate to knockout 1.3.0beta as

<div data-bind="template: {name: 'Bar', foreach: persons, templateOptions:{fooMode: true} }"/>

<script id='Bar'>
    <span data-bind="if: $item.fooMode">FOO!</span>
</script>

但新的原生模板引擎不尊重templateOptions。

But the new native template engine doesn't respect templateOptions.

还有其他方法可以将任意数据传递到模板中吗？

Is there some other way I can pass arbitrary data into a template?

推荐答案

正如您所发现的，本机模板引擎不支持 templateOptions 这是jQuery Template插件的选项功能的包装。

As you discovered, the native template engine does not support templateOptions which was a wrapper to the jQuery Template plug-in's options functionality.

你可以采取两种方式：
将您的数据放在视图模型上并使用 $ root.fooMode 或 $ parent.fooMode 模板。这将是最简单的选项。

Two ways that you could go:Place your data on your view model and use $root.fooMode or $parent.fooMode inside of your template. This would be the easiest option.

否则，如果您不想在视图模型中使用该值，则可以使用自定义绑定来操作上下文，如：

Otherwise, if you don't want the value in your view model, then you can use a custom binding to manipulate the context like:

ko.bindingHandlers.templateWithOptions = {
    init: ko.bindingHandlers.template.init,
    update: function(element, valueAccessor, allBindingsAccessor, viewModel, context) {
        var options = ko.utils.unwrapObservable(valueAccessor());
        //if options were passed attach them to $data
        if (options.templateOptions) {
           context.$data.$item = ko.utils.unwrapObservable(options.templateOptions);
        }
        //call actual template binding
        ko.bindingHandlers.template.update(element, valueAccessor, allBindingsAccessor, viewModel, context);
        //clean up
        delete context.$data.$item;
    }
}

以下是使用中的示例：

Here is a sample in use: http://jsfiddle.net/rniemeyer/tFJuH/

请注意，在 foreach 方案中，您会在 $ parent。$ item 上找到您的选项，而不仅仅是 $ item 。

Note that in a foreach scenario, you would find your options on $parent.$item rather than just $item.

这篇关于将选项传递给击倒1.3中的模板的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

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