@itwin/itwinui-react/cjs/utils/hooks/useIntersection.js

A react component library for iTwinUI

'use strict';
Object.defineProperty(exports, '__esModule', {
  value: true,
});
Object.defineProperty(exports, 'useIntersection', {
  enumerable: true,
  get: function () {
    return useIntersection;
  },
});
const _interop_require_wildcard = require('@swc/helpers/_/_interop_require_wildcard');
const _react = /*#__PURE__*/ _interop_require_wildcard._(require('react'));
const _dom = require('../functions/dom.js');
const useIntersection = (onIntersect, options = {}, once = true) => {
  let { root, rootMargin, threshold } = options;
  let cleanupRef = _react.useRef(() => {});
  let setRef = _react.useCallback(
    (node) => {
      cleanupRef.current?.();
      cleanupRef.current = () => {};
      if (!node || !(0, _dom.getWindow)()?.IntersectionObserver) return;
      let observer = new IntersectionObserver(
        ([entry], obs) => {
          if (entry.isIntersecting) {
            if (once) obs.disconnect();
            onIntersect();
          }
        },
        {
          root,
          rootMargin,
          threshold,
        },
      );
      observer.observe(node);
      cleanupRef.current = () => observer.disconnect();
    },
    [onIntersect, once, root, rootMargin, threshold],
  );
  return setRef;
};