mirror of
https://github.com/node-red/node-red.git
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53 lines
2.7 KiB
HTML
53 lines
2.7 KiB
HTML
<!--
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Copyright JS Foundation and other contributors, http://js.foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<script type="text/html" data-help-name="template">
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<p>根据提供的模板设置属性。</p>
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<h3>输入</h3>
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<dl class="message-properties">
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<dt>msg <span class="property-type">object</span></dt>
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<dd>一个msg对象，其中包含着用于填充模板的信息。</dd>
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<dt class="optional">template <span class="property-type">字符串</span></dt>
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<dd>由<code>msg.payload</code>填充的模板。如果未在编辑面板中配置，则可以将设为msg的属性。</dd>
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</dl>
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<h3>输出</h3>
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<dl class="message-properties">
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<dt>msg <span class="property-type">object</span></dt>
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<dd>由来自传入msg的属性来填充已配置的模板后输出的带有属性的msg。</dd>
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</dl>
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<h3>详细</h3>
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<p>默认情况下使用<i><a href="http://mustache.github.io/mustache.5.html" target="_blank">mustache</a></i>格式。如有需要也可以切换其他格式。</p>
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<p>例如，当模板为:
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<pre>Hello {{payload.name}}. Today is {{date}}</pre>
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<p>收到一条消息，其中包含：
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<pre>{
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date: "Monday",
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payload: {
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name: "Fred"
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}
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}</pre>
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<p>输出的消息将会是:
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<pre>Hello Fred. Today is Monday</pre>
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<p>也可以使用流上下文或全局上下文中的属性：<code>{{flow.name}}</code>或者<code>{{global.name}}</code>，或者为了持久储存<code>store</code>，可以使用<code>{{flow[store].name}}</code>或<code>{{global[store].name}}</code>。
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<p><b>注意：</b>默认情况下，<i>mustache</i>将在其替换的值中转义任何非字母数字或HTML实体。为了防止这种情况，请使用<code>{{{triple}}}</code>大括号。</p>
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<p>如果您需要在内容中使用<code>{{ }}</code>，您可以更改用于标记模板化部分的字符。
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例如，要使用<code>[[ ]]</code>代替，请将以下行添加到模板顶部：</p>
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<pre>{{=[[ ]]=}}</pre>
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<h4>使用环境变量</h4>
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<p>模板节点可以使用以下语法访问环境变量：</p>
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<pre>My favourite colour is {{env.COLOUR}}.</pre>
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</script>
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