@fremtind/jkl-react-hooks/build/cjs/useMutationObserver/useMutationObserver.js

Jøkul react button components

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var useMutationObserver_exports = {};
__export(useMutationObserver_exports, {
  useMutationObserver: () => useMutationObserver
});
module.exports = __toCommonJS(useMutationObserver_exports);
var import_react = require("react");
const hasWindowWithMutationObserver = () => typeof window !== "undefined" && typeof MutationObserver !== "undefined";
const useMutationObserver = (targetRef, onObservation, config) => {
  const observerRef = (0, import_react.useRef)(null);
  (0, import_react.useEffect)(() => {
    let observer = observerRef.current;
    if (hasWindowWithMutationObserver()) {
      const target = targetRef.current;
      if (observer) {
        observer.disconnect();
      }
      observer = new MutationObserver(onObservation);
      if (target) {
        observer.observe(target, config);
      }
    }
    return () => {
      if (hasWindowWithMutationObserver() && observer) {
        observer.disconnect();
      }
    };
  }, [targetRef, onObservation, config]);
};
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