由于asp.net，使用插值将下划线模板与淘汰赛一起使用 [英] Using Underscore Template with Knockout using interpolate due to asp.net

问题描述

问题

由于性能原因，我需要使用下划线模板而不是默认的 KnockoutJS 模板引擎.但是，由于我在 asp.net 环境中，<% 和 %> 的默认标记将无法工作，因为有 asp.net 处理程序.>

工作 jsFiddle

不工作 jsFiddle

我需要的是应用以下内容:

_.templateSettings = {插值:/{{(.+?)}}/g};

使其使用 {{ 和 }} 标签

注意 7:使用 Underscore.js 模板引擎

Underscore.js 模板引擎默认使用 ERB 样式的分隔符(<%= ... %>).以下是使用 Underscore 时前面示例的模板的外观:

这是将 Underscore 模板与 Knockout 集成的简单实现.集成代码只有 16 行，但足以支持 Knockout 数据绑定属性(以及嵌套模板)和 Knockout 绑定上下文变量($parent、$root 等).

如果您不喜欢 <%= ... %> 分隔符，您可以将 Underscore 模板引擎配置为使用您选择的任何其他分隔符.

取自 knockoutjs.com

来自上面的粗体文档

它声明我可以更改分隔符，但没有指定任何具体的操作方法...

当前尝试

ko.underscoreTemplateEngine = function() {};ko.underscoreTemplateEngine.prototype = ko.utils.extend(new ko.templateEngine(), {renderTemplateSource: 函数 (templateSource, bindingContext, options) {//预编译和缓存模板以提高效率var precompiled = templateSource['data']('precompiled');如果(！预编译){预编译 = _.template("<% with($data) { %>" + templateSource.text() + " <% } %>");templateSource['data']('预编译', 预编译);}//运行模板并将其输出解析为一个 DOM 元素数组var renderMarkup = precompiled(bindingContext).replace(/s+/g, " ");返回 ko.utils.parseHtmlFragment(renderedMarkup);},createJavaScriptEvaluatorBlock:函数(脚本){返回<%="+脚本+%>"；}});ko.setTemplateEngine(new ko.underscoreTemplateEngine());

更新:我不再使用上面的我只包括 jquery、下划线和淘汰赛.然后在 script 我只有

_.templateSettings = {插值:/{{([sS]+?)}}/g};

然而，什么都没有被解析.

模板声明是

<p>这表明您可以同时使用 Underscore 风格的计算 (<%= ... %>) <em>和</em>相同模板中的数据绑定属性.</p>

JS

/* ---- 开始将 Underscore 模板引擎与 Knockout 集成.当然可以放在一个单独的文件中.---- */ko.underscoreTemplateEngine = 函数 () { }ko.underscoreTemplateEngine.prototype = ko.utils.extend(new ko.templateEngine(), {renderTemplateSource: 函数 (templateSource, bindingContext, options) {//预编译和缓存模板以提高效率var precompiled = templateSource['data']('precompiled');如果(！预编译){_.templateSettings = {插值:/{{=(.+?)}}/g,转义:/{{-(.+?)}}/g,评估:/{{(.+?)}}/g};预编译 = _.template("{{ with($data) { }} " + templateSource.text() + " {{ } }}");templateSource['data']('预编译', 预编译);}//运行模板并将其输出解析为一个 DOM 元素数组var renderMarkup = precompiled(bindingContext).replace(/s+/g, " ");返回 ko.utils.parseHtmlFragment(renderedMarkup);},createJavaScriptEvaluatorBlock:函数(脚本){返回{{="+脚本+}}"；}});ko.setTemplateEngine(new ko.underscoreTemplateEngine());/* ---- 结束 Underscore 模板引擎与 Knockout 的集成 ---- */var viewModel = {人:ko.observableArray([{ 名称:'Rod'，年龄:123 }，{姓名:'简'，年龄:125}，])};ko.applyBindings(viewModel);

Issue

I need to use the underscore template instead of the default KnockoutJS template engine due to performance. However, since I'm in an asp.net environment the default tags of <% and %> will not work because of the asp.net handler.

Working jsFiddle

Not Working jsFiddle

What I need is to apply something like the following:

_.templateSettings = {
    interpolate : /{{(.+?)}}/g
};

Making it use the {{ and }} tags

Note 7: Using the Underscore.js template engine

The Underscore.js template engine by default uses ERB-style delimiters (<%= ... %>). Here’s how the preceding example’s template might look with Underscore:

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

Here’s a simple implementation of integrating Underscore templates with Knockout. The integration code is just 16 lines long, but it’s enough to support Knockout data-bind attributes (and hence nested templates) and Knockout binding context variables ($parent, $root, etc.).

If you’re not a fan of the <%= ... %> delimiters, you can configure the Underscore template engine to use any other delimiter characters of your choice.

Taken from knockoutjs.com

From the above the bold documentation

It states i can change the delimiter but doesn't specify any specifics on how to do it...

Current Attempt

ko.underscoreTemplateEngine = function() {
};
ko.underscoreTemplateEngine.prototype = ko.utils.extend(new ko.templateEngine(), {
    renderTemplateSource: function (templateSource, bindingContext, options) {
        // Precompile and cache the templates for efficiency
        var precompiled = templateSource['data']('precompiled');
        if (!precompiled) {
            precompiled = _.template("<% with($data) { %> " + templateSource.text() + " <% } %>");
            templateSource['data']('precompiled', precompiled);
        }
        // Run the template and parse its output into an array of DOM elements
        var renderedMarkup = precompiled(bindingContext).replace(/s+/g, " ");
        return ko.utils.parseHtmlFragment(renderedMarkup);
    },
    createJavaScriptEvaluatorBlock: function(script) {
        return "<%= " + script + " %>";
    }
});
ko.setTemplateEngine(new ko.underscoreTemplateEngine());

Update: I no longer am using the above I simply include jquery, underscore, and knockout. Then in script i just have

_.templateSettings = {
    interpolate: /{{([sS]+?)}}/g
};

However, nothing is being parsed.

Template declaration is

<script type="text/html" id="common-table-template">

解决方案

Working Demo jsFiddle

HTML

<h1>People</h1>
<ul data-bind="template: { name: 'peopleList' }"></ul>

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

<p>This shows that you can use both Underscore-style evaluation (<%= ... %>) <em>and</em> data-bind attributes in the same templates.</p>

JS

/* ---- Begin integration of Underscore template engine with Knockout. Could go in a separate file of course. ---- */
    ko.underscoreTemplateEngine = function () { }
    ko.underscoreTemplateEngine.prototype = ko.utils.extend(new ko.templateEngine(), {
        renderTemplateSource: function (templateSource, bindingContext, options) {
            // Precompile and cache the templates for efficiency
            var precompiled = templateSource['data']('precompiled');
            if (!precompiled) {
                _.templateSettings = {
                    interpolate: /{{=(.+?)}}/g,
                    escape:      /{{-(.+?)}}/g,
                    evaluate:    /{{(.+?)}}/g
                };

                precompiled = _.template("{{ with($data) { }} " + templateSource.text() + " {{ } }}");
                templateSource['data']('precompiled', precompiled);
            }
            // Run the template and parse its output into an array of DOM elements
            var renderedMarkup = precompiled(bindingContext).replace(/s+/g, " ");
            return ko.utils.parseHtmlFragment(renderedMarkup);
        },
        createJavaScriptEvaluatorBlock: function(script) {
            return "{{= " + script + " }}";
        }
    });
    ko.setTemplateEngine(new ko.underscoreTemplateEngine());
/* ---- End integration of Underscore template engine with Knockout ---- */

var viewModel = {
    people: ko.observableArray([
        { name: 'Rod', age: 123 },
        { name: 'Jane', age: 125 },
    ])        
};

ko.applyBindings(viewModel);

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