mirror of https://github.com/node-red/node-red.git
34 lines
1.5 KiB
HTML
34 lines
1.5 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/x-red" data-help-name="change">
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<p>設置，更改，刪除或移動消息，流程上下文或全局上下文的屬性。</p>
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<p>如果指定了多個規則，則將按定義的順序來應用它們。</p>
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<h3>詳細</h3>
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<p>可用的操作有：</p>
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<dl class="message-properties">
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<dt>設置</dt>
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<dd>設置一個屬性。該值可以是多種不同類型，也可以從現有消息或上下文屬性中獲取。</dd>
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<dt>置換</dt>
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<dd>搜索並替換屬性。 如果啓用了正則表達式，則可以爲“replace with”屬性指定捕獲組，例如<code>$1</code>。 在替換過程中，僅當規則完全匹配時才能更改屬性類型。</dd>
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<dt>刪除</dt>
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<dd>刪除一個屬性</dd>
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<dt>移動</dt>
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<dd>移動或者重命名一個屬性</dd>
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</dl>
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<p>類型"expression"使用<a href="http://jsonata.org/" target="_new">JSONata</a>語言。</p>
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</script>
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