the-platform/useWindowScrollPosition.js

React Hooks and Suspense-ready Components for Web API's and elements

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useWindowScrollPosition = void 0;

var _react = _interopRequireDefault(require("react"));

var _utils = require("./utils");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }

function _iterableToArrayLimit(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

var useWindowScrollPosition = function useWindowScrollPosition() {
  var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
      _ref$throttleMs = _ref.throttleMs,
      throttleMs = _ref$throttleMs === void 0 ? 100 : _ref$throttleMs;

  var _React$useState = _react.default.useState({
    x: window.pageXOffset,
    y: window.pageYOffset
  }),
      _React$useState2 = _slicedToArray(_React$useState, 2),
      scroll = _React$useState2[0],
      setScroll = _React$useState2[1];

  var handle = (0, _utils.throttle)(function () {
    setScroll({
      x: window.pageXOffset,
      y: window.pageYOffset
    });
  }, throttleMs);

  _react.default.useEffect(function () {
    window.addEventListener('scroll', handle);
    return function () {
      window.removeEventListener('scroll', handle);
    };
  }, []);

  return scroll;
};

exports.useWindowScrollPosition = useWindowScrollPosition;