node-red-nodes/parsers/markdown/70-markdown.html

<script type="text/html" data-template-name="markdown">
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
    <div class="form-row">
        <label for="node-input-property"><i class="fa fa-ellipsis-h"></i> <span data-i18n="node-red:common.label.property"></span></label>
        <input type="text" id="node-input-property" style="width:70%;"/>
    </div>
</script>

<script type="text/html" data-help-name="markdown">
    <p>A function that converts the <code>msg.payload</code> in markdown format to html.</p>
    <p>If the input is a string it converts it to html.</p>
    <p>All other message types are ignored.</p>
    <p>Uses the markdown-it library - You can see a demo
        <a href="https://markdown-it.github.io/">here</a>.</p>
    <p>It is configured with html, linkify and typographer options turned on.</p>

</script>

<script type="text/javascript">
    RED.nodes.registerType('markdown',{
        category: 'parser',
        color:"#DEBD5C",
        defaults: {
            name: {value:""},
            property: {value:"payload",required:true}
        },
        inputs:1,
        outputs:1,
        icon: "parser-markdown.png",
        label: function() {
            return this.name||("msg." + this.property)||"markdown";
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        },
        oneditprepare: function() {
            if (this.property === undefined) {
                $("#node-input-property").val("payload");
            }
            $("#node-input-property").typedInput({default:'msg',types:['msg']});
        }
    });
</script>