Javascript Function: Use Variable instead of single Values-CodePudding

I found here a script. It works fine. But now, I want to use a Variable instead of single values.

Here the original script:

const customData = {
   "func":"bri",
   "oid":"ID",
   "onVal":1,
   "offVal":0,
   "...":"..."
}

const getSubset = (obj, ...keys) => keys.reduce((a, c) => ({ ...a, [c]: obj[c] }), {});
const Light.bri = getSubset(customData, "oid", "onVal", "offVal");

Result (OK):

  bri: {
    offVal: 0,
    oid: "objekt-ID",
    onVal: 1
  },

Now I want to do define the keys in a variable, ideally as a object. But this do not work.

const params = {bri: "oid, onVal, offVal"};
const Light.bri = getSubset(customData, params.bri);

Result (NOK):

  bri: {
    oid, onVal, offVal: undefined
  },
  description: "Deckenspots"
}

what changes do I have to make?

CodePudding user response：

Define the bri property as an array of strings. That way you can use the spread syntax (...) to pass the strings as individual arguments.

const params = {bri: ["oid", "onVal", "offVal"]}; // bri is now an array.
const Light.bri = getSubset(customData, ...params.bri); // Notice the ... before params.bri