rc-tabs/lib/hooks/useSyncState.js

"use strict";

var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard");

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = useSyncState;

var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));

var React = _interopRequireWildcard(require("react"));

function useSyncState(defaultState, onChange) {
  var stateRef = React.useRef(defaultState);

  var _React$useState = React.useState({}),
      _React$useState2 = (0, _slicedToArray2.default)(_React$useState, 2),
      forceUpdate = _React$useState2[1];

  function setState(updater) {
    var newValue = typeof updater === 'function' ? updater(stateRef.current) : updater;

    if (newValue !== stateRef.current) {
      onChange(newValue, stateRef.current);
    }

    stateRef.current = newValue;
    forceUpdate({});
  }

  return [stateRef.current, setState];
}