aria-live-storybook-addon/dist/esm/Panel.js

Observe and log aria-live region changes in the addon panel

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 _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; }

function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }

function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread 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 _iterableToArray(iter) { if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter); }

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

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 ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) { symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); } keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

import React from "react";
import { useChannel } from "@storybook/api";
import { AddonPanel } from "@storybook/components";
import { EVENTS } from "./constants";
import { PanelContent } from "./components/PanelContent";
import StorybookCoreEvents from "@storybook/core-events";
var STORY_CHANGED = StorybookCoreEvents.STORY_CHANGED;
var INITIAL_STATE = {
  changes: []
};

function liveRegionChangesReducer(state, action) {
  switch (action.type) {
    case "add_change":
      return _objectSpread(_objectSpread({}, state), {}, {
        changes: [].concat(_toConsumableArray(state.changes), [action.payload])
      });

    case "clear":
      return INITIAL_STATE;
    // @ts-expect-error

    case "unknown_type":
      return state;

    default:
      return state;
  }
}

export var Panel = function Panel(props) {
  var _handlers;

  var _React$useReducer = React.useReducer(liveRegionChangesReducer, INITIAL_STATE),
      _React$useReducer2 = _slicedToArray(_React$useReducer, 2),
      ariaLiveRegionChanges = _React$useReducer2[0],
      dispatchAriaLiveRegionCange = _React$useReducer2[1]; // https://storybook.js.org/docs/react/addons/addons-api#usechannel


  var handlers = (_handlers = {}, _defineProperty(_handlers, STORY_CHANGED, function () {
    return dispatchAriaLiveRegionCange({
      type: "clear"
    });
  }), _defineProperty(_handlers, EVENTS.ADD_CHANGE, function (payload) {
    return dispatchAriaLiveRegionCange({
      type: "add_change",
      payload: payload
    });
  }), _defineProperty(_handlers, "iWillErrorBanana", function iWillErrorBanana() {}), _handlers);
  var emit = useChannel(handlers);
  return /*#__PURE__*/React.createElement(AddonPanel, props, /*#__PURE__*/React.createElement(PanelContent, {
    results: ariaLiveRegionChanges
  }));
};