react-lightning-design-system/lib/scripts/hooks.js

Salesforce Lightning Design System components built with React

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useControlledValue = useControlledValue;
exports.useEventCallback = useEventCallback;
exports.useMergeRefs = useMergeRefs;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _react = require("react");
var _reactMergeRefs = _interopRequireDefault(require("react-merge-refs"));
function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
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 useControlledValue(value, defaultValue) {
  var initValue = typeof value !== 'undefined' ? value : defaultValue;
  var _useState = (0, _react.useState)(initValue),
    _useState2 = (0, _slicedToArray2["default"])(_useState, 2),
    stateValue = _useState2[0],
    setStateValue = _useState2[1];
  return [typeof value !== 'undefined' ? value : stateValue, setStateValue];
}

/**
 *
 */
function useEventCallback(callback) {
  var ref = (0, _react.useRef)(function () {
    throw new Error('Should not call function in render');
  });
  (0, _react.useLayoutEffect)(function () {
    ref.current = callback;
  });
  return (0, _react.useCallback)(function () {
    return ref.current.apply(ref, arguments);
  }, []);
}

/**
 *
 */
function useMergeRefs(refs) {
  var mrefs = [];
  var _iterator = _createForOfIteratorHelper(refs),
    _step;
  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      var ref = _step.value;
      if (ref != null) {
        mrefs.push(ref);
      }
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }
  return (0, _react.useMemo)(function () {
    return (0, _reactMergeRefs["default"])(mrefs);
  }, [].concat(mrefs));
}
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