How to update the UI surface on Dashboard when a new message arrived

Developing Nodes
1

Hello!
I am in the process of creating my first node to display a speedometer on the dashboard.
I have the problem that the written HTML code for the dashboard is not updated when a new message arrives.
My code is structured according to the following scheme:

module.exports = function(RED) {
  function html(config) {
    var code = String.raw`
    <div>
      <p>text</p>
      <p>${config.var}</p>
    </div>`;
    return code;
  }

  function node(config) {
    var ui = RED.require("node-red-dashboard")(RED);
    RED.nodes.createNode(this, config);
    var done = ui.addWidget({
      format: html(config);
      //definition of more properties
    })
  }
  RED.nodes.registerType('ui_node',FirstNode);
}

Is there a function that regenerates the HTML code or is there another way to define the HTML code so that it is regenerated with each new message?

Thank you for your replies.

2

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