Error while creating my first custom node - "ReferenceError: done is not defined"

Developing Nodes
1

Hi! I'm trying to create my first custom node, but I get this weird error: "ReferenceError: done is not defined" when I try to run my custom node. The thing is I don't use "done" method anywhere in the code. The node is supposed to be simple hysteresis controller.
.js file:

module.exports = function (RED) {
  function HysteresisNode(config) {
    RED.nodes.createNode(this, config);
    let node = this;
    node.on("input", function (msg) {
      const highPlus = msg.payload.high;
      const lowPlus = msg.payload.low;
      const threshold = msg.payload.threshold;
      const current = msg.payload.current;

      if (threshold + highPlus >= current) {
        msg.payload = node.highOutput;
        node.send(msg);
      } else if (threshold - lowPlus <= current) {
        msg.payload = node.lowOutput;
        node.send(msg);
      }
    });
  }

  RED.nodes.registerType("hysteresis", HysteresisNode);
};

.html file:

<script type="text/javascript">
  RED.nodes.registerType("hysteresis", {
    label: "hysteresis",
    category: "function",
    color: "#a6bbcf",
    inputs: 1,
    outputs: 1,
    icon: "font-awesome/fa-cogs",
    defaults: {
      highOutput: { value: false },
      lowOutput: { value: false },
      highOutputType: { value: "bool" },
      lowOutputType: { value: "bool" },
    },
    oneditprepare: function () {
      $("#node-input-highOutput").typedInput({
        type: "bool",
        types: ["bool", "num", "str"],
        default: "bool",
        typeField: "#node-input-highOutput-type",
      });

      $("#node-input-lowOutput").typedInput({
        type: "bool",
        types: ["bool", "num", "str"],
        default: "bool",
        typeField: "#node-input-lowOutput-type",
      });
    },
  });
</script>

<script type="text/html" data-template-name="hysteresis">
  <p>Output values:</p>
  <div class="form-row">
    <label for="node-input-highOutput"
      ><i class="fa fa-tag"></i>Upper Threshold</label
    >
    <input type="text" id="node-input-highOutput" />
    <input type="hidden" id="node-input-highOutputType" />
  </div>
  <div class="form-row">
    <label for="node-input-lowOutput"
      ><i class="fa fa-tag"></i>Lower Threshold</label
    >
    <input type="text" id="node-input-lowOutput" />
    <input type="hidden" id="node-input-lowOutputType" />
  </div>
  <div class="form-tips"><b>Tip:</b> This is here to help.v</div>
</script>

package.json

{
  "name": "node-red-contrib-easy-hysteresis",
  "version": "1.0.3",
  "description": "",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "node-red": {
    "nodes": {
      "hysteresis": "hysteresis.js"
    }
  }
}
2

As the documentation says:

With Node-RED 1.0, a new style of the listener was introduced to allow the node to notify the runtime when it has finished handling a message. This added two new parameters to the listener function. Some care is needed to ensure the node can still be installed in Node-RED 0.x which does not use this new style of the listener.

this.on('input', function(msg, send, done) {

Did you check if the error persists if you use the correct / current interface definition of

[...].on('input', function(msg, send, done) { ... }
3

I've changed my code according to documentation, yet, the same error occurs.

.js:

module.exports = function (RED) {
  function HysteresisNode(config) {
    RED.nodes.createNode(this, config);
    let node = this;
    node.on("input", function (msg, send, done) {
      const highPlus = msg.payload.high;
      const lowPlus = msg.payload.low;
      const threshold = msg.payload.threshold;
      const current = msg.payload.current;

      send =
        send ||
        function () {
          node.send.apply(node, arguments);
        };

      if (threshold + highPlus >= current) {
        msg.payload = node.highOutput;
        send(msg);
      } else if (threshold - lowPlus <= current) {
        msg.payload = node.lowOutput;
        send(msg);
      }

      if (done) {
        done();
      }
    });
  }

  RED.nodes.registerType("hysteresis", HysteresisNode);
};

ReferenceError: done is not defined

4

The code you posted looks fine. Are you sure, this error is coming from your custom node?
If you share a link to a repository or post the content of both files here, I could try to test your node on my local system - for verification purposes.

5

I'm sorry I haven't responded for so long.
Here's the .tgz archive with all the files (HTML and JSON files haven't been changed since my first post): https://we.tl/t-YUvS5APLPc.
And this is the flow I'm testing my node at:

[
    {
        "id": "5fc79c843f20daa3",
        "type": "function",
        "z": "02ac266ad9de5972",
        "name": "function 15",
        "func": "msg.payload = {\n    high: 0.2,\n    low: 0.3,\n    threshold: 25,\n    current: 24.8\n}\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 450,
        "y": 300,
        "wires": [
            [
                "24f94a71fc033aa1"
            ]
        ]
    },
    {
        "id": "10dc9f46fc794db2",
        "type": "debug",
        "z": "02ac266ad9de5972",
        "name": "debug 3",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "statusVal": "",
        "statusType": "auto",
        "x": 740,
        "y": 300,
        "wires": []
    },
    {
        "id": "b5f837479d3a02c4",
        "type": "inject",
        "z": "02ac266ad9de5972",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 300,
        "y": 300,
        "wires": [
            [
                "5fc79c843f20daa3"
            ]
        ]
    },
    {
        "id": "24f94a71fc033aa1",
        "type": "hysteresis",
        "z": "02ac266ad9de5972",
        "highOutput": "false",
        "lowOutput": "false",
        "highOutputType": "bool",
        "lowOutputType": "bool",
        "x": 600,
        "y": 300,
        "wires": [
            [
                "10dc9f46fc794db2"
            ]
        ]
    }
]
6

Whereas your node (currently) isn't doing anything useful, it's not creating the error you see either - on my system:

image
image2046×590 62.5 KB

To stay fair: The node does what it is told to do. highOutput and lowOutput are undefined. Just follow this section in the documentation to manage the TypedInput control correctly.