Proper use of msg.template / controlling the execution of template node

Dashboard
1

After the user is logged-in im my dashboard I want a template to be executed, which changes the color of a tab in the sidebar. My problem: I´ve been trying to achieve this behaviour by sending the style properties in msg.template to the node, but it doesnt do anything.
Here is what I was trying:

[
    {
        "id": "ab3cecbbaca469ea",
        "type": "template",
        "z": "57f319143e2d929c",
        "name": "send empty",
        "field": "template",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "",
        "output": "str",
        "x": 950,
        "y": 540,
        "wires": [
            [
                "79f2285a15c59faf"
            ]
        ]
    },
    {
        "id": "5c9c5b17f4e3af94",
        "type": "template",
        "z": "57f319143e2d929c",
        "name": "send template",
        "field": "template",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "<style>       body.nr-dashboard-theme md-list-item._md-button-wrap:nth-child(1) > div:nth-child(1) > div:nth-child(2) {   background-color:#32cd32;   color: white; }      </style>",
        "output": "str",
        "x": 960,
        "y": 600,
        "wires": [
            [
                "79f2285a15c59faf"
            ]
        ]
    },
    {
        "id": "79f2285a15c59faf",
        "type": "ui_template",
        "z": "57f319143e2d929c",
        "group": "7ce31291a1cf860d",
        "name": "",
        "order": 0,
        "width": 0,
        "height": 0,
        "format": "",
        "storeOutMessages": true,
        "fwdInMessages": true,
        "resendOnRefresh": true,
        "templateScope": "global",
        "className": "",
        "x": 1160,
        "y": 560,
        "wires": [
            []
        ]
    },
    {
        "id": "7e4d3b1fa4c2078c",
        "type": "inject",
        "z": "57f319143e2d929c",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "true",
        "payloadType": "bool",
        "x": 760,
        "y": 600,
        "wires": [
            [
                "5c9c5b17f4e3af94"
            ]
        ]
    },
    {
        "id": "5fdd6d424d5a3bee",
        "type": "inject",
        "z": "57f319143e2d929c",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "false",
        "payloadType": "bool",
        "x": 750,
        "y": 540,
        "wires": [
            [
                "ab3cecbbaca469ea"
            ]
        ]
    },
    {
        "id": "7ce31291a1cf860d",
        "type": "ui_group",
        "name": "Das ist Gruppe 1",
        "tab": "",
        "order": 1,
        "disp": true,
        "width": "6",
        "collapse": false,
        "className": ""
    }
]
2

grafik
grafik962×264 14.4 KB

3

The red triangle indicates an error in your code.

4

It´s an empty template tho.

grafik
grafik825×622 12.2 KB

The red triangle appears as soon as I add it to the head section.
Is there like a minimum code the template needs to hold?

5

Since it worked as long as the template is defined as a "widget in group" I solved it like a noob,copying
the template in a group of every tab I have :smiley:

grafik
grafik701×363 29.3 KB