如何在i18next中使用Knockout observable？

问题描述

我试图以某种方式动态地使用i18next翻译和Knockout.js，但我无法弄清楚如何。

I'm trying to somehow dynamically use i18next translations together with Knockout.js, but I cant figure out how.

既不是自定义Knockout绑定也不是i18next jQuery插件似乎与可观察值一起工作。

Neither a custom Knockout binding or the i18next jQuery plugin seems to work with observable values.

我可以在这里找到我想要实现的演示：

A demo of what I'm trying to achieve can be found here: http://jsfiddle.net/rdfx2/1/

解决方法是这样的，但如果可能的话，我宁愿避免这种情况：

A workaround is something like this, but I'd rather avoid that, if possible:

<div data-bind="text: translate('key', observable)"></div>

self.translate = function (key, value) {
   return i18next.t(key, {
      "var": value
   });
};

谢谢，

推荐答案

我对i18next不是很熟悉，所以我可能错误地使用了i18next，但你可以通过创建一个bindingHandler轻松实现这一点。这种bindingHandler的一个非常简单的版本，支持传递可选选项，可能如下所示：

I'm not very familiar with i18next, so I might be using i18next incorrectly, but you could easily achieve this by creating a bindingHandler. A very simple version of such a bindingHandler, which supports passing optional options, could look like:

ko.bindingHandlers['translatedText'] = {
    update: function(element, valueAccessor, allBindings){
        var key = ko.unwrap(valueAccessor());
        var options = ko.toJS(allBindings.get('translationOptions') || {});
        var translation = i18n.t(key, options);
        element.innerText = translation;
    }
};

给出以下i18next初始化代码：

Given the following i18next initialization code:

i18n.init({
    lng: "en",
    debug: true,
    resStore: {
        en: {
            translation: {
                'myTextKey': 'My translated value is "__value__"',
                'otherTextKey': 'This is just a text which does not use options'
            }
        }
    }
});

您可以将它与以下HTML一起使用：

You could use it with the following HTML:

<input type="text" data-bind="value: input, valueUpdate: 'afterkeydown'"/>
<div data-bind="translatedText: 'myTextKey', translationOptions: { value: input }"></div>
<div data-bind="translatedText: 'otherTextKey'"></div>

以下视图模型：

function ViewModel(){
    this.input = ko.observable();
}

ko.applyBindings(new ViewModel);

我已将上述代码保存到jsfiddle，您可以在

I have saved the above code to a jsfiddle which you can find at http://jsfiddle.net/md2Hr/

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