@eoet/use-state-if-mounted/dist/useStateIfMounted.js

A hook for updating state only if the component is mounted.

"use strict";

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

var _useIsComponentMounted = _interopRequireDefault(require("./useIsComponentMounted"));

var _react = require("react");

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

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

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _iterableToArrayLimit(arr, i) { var _i = arr && (typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]); if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_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; }

/**
 * Like React's [useState](https://reactjs.org/docs/hooks-reference.html#usestate)
 * but it makes sure the component that uses this hook is mounted when updating state
 *
 * @see https://reactjs.org/docs/hooks-reference.html#usestate
 * @export
 * @param {any} initialValue
 * @returns {[any, Diapatch<any>]} an array of 2 items
 * the first is the current state, the second is a function that enables
 * updating the state if the component is not mounted
 */
function useStateIfMounted(initialValue) {
  var isComponentMounted = (0, _useIsComponentMounted["default"])();

  var _useState = (0, _react.useState)(initialValue),
      _useState2 = _slicedToArray(_useState, 2),
      state = _useState2[0],
      setState = _useState2[1];

  var newSetState = (0, _react.useCallback)(function (value) {
    if (isComponentMounted.current) {
      setState(value);
    }
  });
  return [state, newSetState];
}