@macrostrat/column-components/dist/chroma-js/src/ops/set.js

React rendering primitives for stratigraphic columns

import Color from "../Color.js";
import type from "../utils/type.js";
Color.prototype.set = function(mc, value, mutate = false) {
  const [mode, channel] = mc.split(".");
  const src = this[mode]();
  if (channel) {
    const i = mode.indexOf(channel) - (mode.substr(0, 2) === "ok" ? 2 : 0);
    if (i > -1) {
      if (type(value) == "string") {
        switch (value.charAt(0)) {
          case "+":
            src[i] += +value;
            break;
          case "-":
            src[i] += +value;
            break;
          case "*":
            src[i] *= +value.substr(1);
            break;
          case "/":
            src[i] /= +value.substr(1);
            break;
          default:
            src[i] = +value;
        }
      } else if (type(value) === "number") {
        src[i] = value;
      } else {
        throw new Error(`unsupported value for Color.set`);
      }
      const out = new Color(src, mode);
      if (mutate) {
        this._rgb = out._rgb;
        return this;
      }
      return out;
    }
    throw new Error(`unknown channel ${channel} in mode ${mode}`);
  } else {
    return src;
  }
};
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