node-red/nodes/core/core/80-function.html

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    <div class="form-row">
        <label for="node-input-name"><i class="icon-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
    <div class="form-row">
        <label for="node-input-func"><i class="icon-wrench"></i> Function</label>
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    <div class="form-tips">See the Info tab for help writing functions.</div>
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<script type="text/x-red" data-help-name="function">
	<p>A function block where you can write code to do more interesting things.</p>
	<p>The message is passed in as a JavaScript object called <code>msg</code>.</p>
	<p>By convention it will have a <code>msg.payload</code> property containing
	   the body of the message.</p>
	<p>The function should return the messages it wants to pass on to the next nodes
	in the flow. It can return:</p>
	<ul>
	  <li>a single message object - passed to nodes connected to the first output</li>
	  <li>an array of message objects - passed to nodes connected to the corresponding outputs</li>
    </ul>
    <p>If any element of the array is itself an array of messages, multiple
	      messages are sent to the corresponding output.</p>
	<p>If null is returned, either by itself or as an element of the array, no
	      message is passed on.</p>
	<p>See the <a target="_new" href="http://nodered.org/docs/writing-functions.html">online documentation</a> for more help.</p>
	      
</script>

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