test-node.html

<script type="text/javascript">
	/* global RED:false */
	RED.nodes.registerType('test-node', {
		category: 'function',
		defaults: {
			name: { value: '' },
			multiplyBy: { value: 2 },
		},
		inputs: 1,
		outputs: 1,
		icon: 'function.png',
		label: function () {
			return this.name || 'test-node';
		},
	});
</script>

<script type="text/x-red" data-template-name="test-node">
	<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-multiplyBy"><i class="icon-tag"></i> Multiply by</label>
		<input type="number" id="node-input-multiplyBy" placeholder="2" />
	</div>
</script>

<script type="text/x-red" data-help-name="test-node">
	<p>
		This test node will multiply the payload by the value given in the <code>multiplyBy</code> property.
	</p>
</script>