react-accessible-accordion/dist/es/index.js

Accessible Accordion component for React

import { createElement, PureComponent, createContext, useId, useState, Fragment } from 'react';

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function _classCallCheck(instance, Constructor) {
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function _defineProperties(target, props) {
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function _createClass(Constructor, protoProps, staticProps) {
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function _defineProperty(obj, key, value) {
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function _extends() {
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function _inherits(subClass, superClass) {
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function _getPrototypeOf(o) {
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function _setPrototypeOf(o, p) {
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function _isNativeReflectConstruct() {
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function _objectWithoutPropertiesLoose(source, excluded) {
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function _objectWithoutProperties(source, excluded) {
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function _assertThisInitialized(self) {
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  return self;
}

function _possibleConstructorReturn(self, call) {
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}

function _createSuper(Derived) {
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  return function _createSuperInternal() {
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        result;

    if (hasNativeReflectConstruct) {
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}

function _slicedToArray(arr, i) {
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}

function _toConsumableArray(arr) {
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}

function _arrayWithoutHoles(arr) {
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function _arrayWithHoles(arr) {
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function _iterableToArray(iter) {
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function _iterableToArrayLimit(arr, i) {
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function _unsupportedIterableToArray(o, minLen) {
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}

function _arrayLikeToArray(arr, len) {
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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 _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.");
}

var AccordionStore = /*#__PURE__*/_createClass(function AccordionStore(_ref) {
  var _this = this;

  var _ref$expanded = _ref.expanded,
      _expanded = _ref$expanded === void 0 ? [] : _ref$expanded,
      _ref$allowMultipleExp = _ref.allowMultipleExpanded,
      allowMultipleExpanded = _ref$allowMultipleExp === void 0 ? false : _ref$allowMultipleExp,
      _ref$allowZeroExpande = _ref.allowZeroExpanded,
      allowZeroExpanded = _ref$allowZeroExpande === void 0 ? false : _ref$allowZeroExpande;

  _classCallCheck(this, AccordionStore);

  _defineProperty(this, "expanded", void 0);

  _defineProperty(this, "allowMultipleExpanded", void 0);

  _defineProperty(this, "allowZeroExpanded", void 0);

  _defineProperty(this, "toggleExpanded", function (uuid) {
    if (_this.isItemDisabled(uuid)) {
      return _this;
    }

    var isExpanded = _this.isItemExpanded(uuid);

    if (!isExpanded) {
      return _this.augment({
        expanded: _this.allowMultipleExpanded ? [].concat(_toConsumableArray(_this.expanded), [uuid]) : [uuid]
      });
    } else {
      return _this.augment({
        expanded: _this.expanded.filter(function (expandedUuid) {
          return expandedUuid !== uuid;
        })
      });
    }
  });

  _defineProperty(this, "isItemDisabled", function (uuid) {
    var isExpanded = _this.isItemExpanded(uuid);

    var isOnlyOneExpanded = _this.expanded.length === 1;
    return Boolean(isExpanded && !_this.allowZeroExpanded && isOnlyOneExpanded);
  });

  _defineProperty(this, "isItemExpanded", function (uuid) {
    return _this.expanded.indexOf(uuid) !== -1;
  });

  _defineProperty(this, "getPanelAttributes", function (uuid, dangerouslySetExpanded) {
    var expanded = dangerouslySetExpanded !== null && dangerouslySetExpanded !== void 0 ? dangerouslySetExpanded : _this.isItemExpanded(uuid);
    return {
      role: _this.allowMultipleExpanded ? undefined : 'region',
      'aria-hidden': _this.allowMultipleExpanded ? !expanded : undefined,
      'aria-labelledby': _this.getButtonId(uuid),
      id: _this.getPanelId(uuid),
      hidden: expanded ? undefined : true
    };
  });

  _defineProperty(this, "getHeadingAttributes", function () {
    return {
      role: 'heading'
    };
  });

  _defineProperty(this, "getButtonAttributes", function (uuid, dangerouslySetExpanded) {
    var expanded = dangerouslySetExpanded !== null && dangerouslySetExpanded !== void 0 ? dangerouslySetExpanded : _this.isItemExpanded(uuid);

    var disabled = _this.isItemDisabled(uuid);

    return {
      id: _this.getButtonId(uuid),
      'aria-disabled': disabled,
      'aria-expanded': expanded,
      'aria-controls': _this.getPanelId(uuid),
      role: 'button',
      tabIndex: 0
    };
  });

  _defineProperty(this, "getPanelId", function (id) {
    return "accordion__panel-".concat(id);
  });

  _defineProperty(this, "getButtonId", function (id) {
    return "accordion__heading-".concat(id);
  });

  _defineProperty(this, "augment", function (args) {
    return new AccordionStore(_objectSpread2({
      expanded: _this.expanded,
      allowMultipleExpanded: _this.allowMultipleExpanded,
      allowZeroExpanded: _this.allowZeroExpanded
    }, args));
  });

  this.expanded = _expanded;
  this.allowMultipleExpanded = allowMultipleExpanded;
  this.allowZeroExpanded = allowZeroExpanded;
});

var Context = /*#__PURE__*/createContext(null);
var Provider = /*#__PURE__*/function (_React$PureComponent) {
  _inherits(Provider, _React$PureComponent);

  var _super = _createSuper(Provider);

  function Provider() {
    var _this;

    _classCallCheck(this, Provider);

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = _super.call.apply(_super, [this].concat(args));

    _defineProperty(_assertThisInitialized(_this), "state", new AccordionStore({
      expanded: _this.props.preExpanded,
      allowMultipleExpanded: _this.props.allowMultipleExpanded,
      allowZeroExpanded: _this.props.allowZeroExpanded
    }));

    _defineProperty(_assertThisInitialized(_this), "toggleExpanded", function (key) {
      _this.setState(function (state) {
        return state.toggleExpanded(key);
      }, function () {
        if (_this.props.onChange) {
          _this.props.onChange(_this.state.expanded);
        }
      });
    });

    _defineProperty(_assertThisInitialized(_this), "isItemDisabled", function (key) {
      return _this.state.isItemDisabled(key);
    });

    _defineProperty(_assertThisInitialized(_this), "isItemExpanded", function (key) {
      return _this.state.isItemExpanded(key);
    });

    _defineProperty(_assertThisInitialized(_this), "getPanelAttributes", function (key, dangerouslySetExpanded) {
      return _this.state.getPanelAttributes(key, dangerouslySetExpanded);
    });

    _defineProperty(_assertThisInitialized(_this), "getHeadingAttributes", function () {
      // uuid: UUID
      return _this.state.getHeadingAttributes();
    });

    _defineProperty(_assertThisInitialized(_this), "getButtonAttributes", function (key, dangerouslySetExpanded) {
      return _this.state.getButtonAttributes(key, dangerouslySetExpanded);
    });

    return _this;
  }

  _createClass(Provider, [{
    key: "render",
    value: function render() {
      var _this$state = this.state,
          allowZeroExpanded = _this$state.allowZeroExpanded,
          allowMultipleExpanded = _this$state.allowMultipleExpanded;
      return /*#__PURE__*/createElement(Context.Provider, {
        value: {
          allowMultipleExpanded: allowMultipleExpanded,
          allowZeroExpanded: allowZeroExpanded,
          toggleExpanded: this.toggleExpanded,
          isItemDisabled: this.isItemDisabled,
          isItemExpanded: this.isItemExpanded,
          getPanelAttributes: this.getPanelAttributes,
          getHeadingAttributes: this.getHeadingAttributes,
          getButtonAttributes: this.getButtonAttributes
        }
      }, this.props.children || null);
    }
  }]);

  return Provider;
}(PureComponent);

_defineProperty(Provider, "defaultProps", {
  allowMultipleExpanded: false,
  allowZeroExpanded: false
});

var Consumer = /*#__PURE__*/function (_React$PureComponent2) {
  _inherits(Consumer, _React$PureComponent2);

  var _super2 = _createSuper(Consumer);

  function Consumer() {
    var _this2;

    _classCallCheck(this, Consumer);

    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
      args[_key2] = arguments[_key2];
    }

    _this2 = _super2.call.apply(_super2, [this].concat(args));

    _defineProperty(_assertThisInitialized(_this2), "renderChildren", function (container) {
      return container ? _this2.props.children(container) : null;
    });

    return _this2;
  }

  _createClass(Consumer, [{
    key: "render",
    value: function render() {
      return /*#__PURE__*/createElement(Context.Consumer, null, this.renderChildren);
    }
  }]);

  return Consumer;
}(PureComponent);

var _excluded = ["className", "allowMultipleExpanded", "allowZeroExpanded", "onChange", "preExpanded"];

var Accordion = function Accordion(_ref) {
  var _ref$className = _ref.className,
      className = _ref$className === void 0 ? 'accordion' : _ref$className,
      allowMultipleExpanded = _ref.allowMultipleExpanded,
      allowZeroExpanded = _ref.allowZeroExpanded,
      onChange = _ref.onChange,
      preExpanded = _ref.preExpanded,
      rest = _objectWithoutProperties(_ref, _excluded);

  return /*#__PURE__*/createElement(Provider, {
    preExpanded: preExpanded,
    allowMultipleExpanded: allowMultipleExpanded,
    allowZeroExpanded: allowZeroExpanded,
    onChange: onChange
  }, /*#__PURE__*/createElement("div", _extends({
    "data-accordion-component": "Accordion",
    className: className
  }, rest)));
};

var DisplayName;

(function (DisplayName) {
  DisplayName["Accordion"] = "Accordion";
  DisplayName["AccordionItem"] = "AccordionItem";
  DisplayName["AccordionItemButton"] = "AccordionItemButton";
  DisplayName["AccordionItemHeading"] = "AccordionItemHeading";
  DisplayName["AccordionItemPanel"] = "AccordionItemPanel";
})(DisplayName || (DisplayName = {}));

var DisplayName$1 = DisplayName;

// @ts-ignore
var DEFAULT = 0;
var counter = 0;
function useGlobalCounterId() {
  var current = counter;
  counter = counter + 1;
  return "raa-".concat(current);
}
function resetGlobalCounterId() {
  counter = DEFAULT;
}
var useNextId = useId || useGlobalCounterId; // HTML5 ids allow all unicode characters, except for ASCII whitespaces
// https://infra.spec.whatwg.org/#ascii-whitespace
// eslint-disable-next-line no-control-regex

var idRegex = /[\u0009\u000a\u000c\u000d\u0020]/g;
function assertValidHtmlId(htmlId) {
  if (htmlId === '' || idRegex.test(htmlId)) {
    console.error("uuid must be a valid HTML5 id but was given \"".concat(htmlId, "\", ASCII whitespaces are forbidden"));
    return false;
  }

  return true;
}

var Context$1 = /*#__PURE__*/createContext(null);

var Provider$1 = function Provider(_ref) {
  var children = _ref.children,
      uuid = _ref.uuid,
      accordionContext = _ref.accordionContext,
      dangerouslySetExpanded = _ref.dangerouslySetExpanded;

  var toggleExpanded = function toggleExpanded() {
    accordionContext.toggleExpanded(uuid);
  };

  var renderChildren = function renderChildren(accordionContext) {
    var expanded = dangerouslySetExpanded !== null && dangerouslySetExpanded !== void 0 ? dangerouslySetExpanded : accordionContext.isItemExpanded(uuid);
    var disabled = accordionContext.isItemDisabled(uuid);
    var panelAttributes = accordionContext.getPanelAttributes(uuid, dangerouslySetExpanded);
    var headingAttributes = accordionContext.getHeadingAttributes(uuid);
    var buttonAttributes = accordionContext.getButtonAttributes(uuid, dangerouslySetExpanded);
    return /*#__PURE__*/createElement(Context$1.Provider, {
      value: {
        uuid: uuid,
        expanded: expanded,
        disabled: disabled,
        toggleExpanded: toggleExpanded,
        panelAttributes: panelAttributes,
        headingAttributes: headingAttributes,
        buttonAttributes: buttonAttributes
      }
    }, children);
  };

  return /*#__PURE__*/createElement(Consumer, null, renderChildren);
};

var ProviderWrapper = function ProviderWrapper(props) {
  return /*#__PURE__*/createElement(Consumer, null, function (accordionContext) {
    return /*#__PURE__*/createElement(Provider$1, _extends({}, props, {
      accordionContext: accordionContext
    }));
  });
};
var Consumer$1 = function Consumer(_ref2) {
  var children = _ref2.children;

  var renderChildren = function renderChildren(container) {
    return container ? children(container) : null;
  };

  return /*#__PURE__*/createElement(Context$1.Consumer, null, renderChildren);
};

var _excluded$1 = ["uuid", "dangerouslySetExpanded", "className", "activeClassName"];

var AccordionItem = function AccordionItem(_ref) {
  var customUuid = _ref.uuid,
      dangerouslySetExpanded = _ref.dangerouslySetExpanded,
      _ref$className = _ref.className,
      className = _ref$className === void 0 ? 'accordion__item' : _ref$className,
      activeClassName = _ref.activeClassName,
      rest = _objectWithoutProperties(_ref, _excluded$1);

  var _useState = useState(useNextId()),
      _useState2 = _slicedToArray(_useState, 1),
      instanceUuid = _useState2[0];

  var uuid = customUuid !== null && customUuid !== void 0 ? customUuid : instanceUuid;

  var renderChildren = function renderChildren(itemContext) {
    var expanded = itemContext.expanded;
    var cx = expanded && activeClassName ? activeClassName : className;
    return /*#__PURE__*/createElement("div", _extends({
      "data-accordion-component": "AccordionItem",
      className: cx
    }, rest));
  };

  assertValidHtmlId(uuid.toString());

  if (rest.id) {
    assertValidHtmlId(rest.id);
  }

  return /*#__PURE__*/createElement(ProviderWrapper, {
    uuid: uuid,
    dangerouslySetExpanded: dangerouslySetExpanded
  }, /*#__PURE__*/createElement(Consumer$1, null, renderChildren));
};

AccordionItem.displayName = DisplayName$1.AccordionItem;

function getClosestAccordion(el) {
  return el && (el.matches('[data-accordion-component="Accordion"]') ? el : getClosestAccordion(el.parentElement));
}
function getSiblingButtons(item) {
  var parentAccordion = getClosestAccordion(item);
  return parentAccordion && Array.from(parentAccordion.querySelectorAll('[data-accordion-component="AccordionItemButton"]'));
}
function focusFirstSiblingOf(item) {
  var siblings = getSiblingButtons(item) || [];
  var first = siblings[0];

  if (first) {
    first.focus();
  }
}
function focusLastSiblingOf(item) {
  var siblings = getSiblingButtons(item) || [];
  var last = siblings[siblings.length - 1];

  if (last) {
    last.focus();
  }
}
function focusNextSiblingOf(item) {
  var siblings = getSiblingButtons(item) || [];
  var currentIndex = siblings.indexOf(item);

  if (currentIndex !== -1) {
    var next = siblings[currentIndex + 1];

    if (next) {
      next.focus();
    }
  }
}
function focusPreviousSiblingOf(item) {
  var siblings = getSiblingButtons(item) || [];
  var currentIndex = siblings.indexOf(item);

  if (currentIndex !== -1) {
    var previous = siblings[currentIndex - 1];

    if (previous) {
      previous.focus();
    }
  }
}

var keycodes = {
  END: 'End',
  ENTER: 'Enter',
  HOME: 'Home',
  SPACE: ' ',
  SPACE_DEPRECATED: 'Spacebar',
  UP: 'ArrowUp',
  DOWN: 'ArrowDown',
  LEFT: 'ArrowLeft',
  RIGHT: 'ArrowRight'
};

var _excluded$2 = ["toggleExpanded", "className"];

var AccordionItemButton = function AccordionItemButton(_ref) {
  var toggleExpanded = _ref.toggleExpanded,
      _ref$className = _ref.className,
      className = _ref$className === void 0 ? 'accordion__button' : _ref$className,
      rest = _objectWithoutProperties(_ref, _excluded$2);

  var handleKeyPress = function handleKeyPress(evt) {
    var keyCode = evt.key;

    if (keyCode === keycodes.ENTER || keyCode === keycodes.SPACE || keyCode === keycodes.SPACE_DEPRECATED) {
      evt.preventDefault();
      toggleExpanded();
    }
    /* The following block is ignored from test coverage because at time
     * time of writing Jest/react-testing-library can not assert 'focus'
     * functionality.
     */
    // istanbul ignore next


    if (evt.target instanceof HTMLElement) {
      switch (keyCode) {
        case keycodes.HOME:
          {
            evt.preventDefault();
            focusFirstSiblingOf(evt.target);
            break;
          }

        case keycodes.END:
          {
            evt.preventDefault();
            focusLastSiblingOf(evt.target);
            break;
          }

        case keycodes.LEFT:
        case keycodes.UP:
          {
            evt.preventDefault();
            focusPreviousSiblingOf(evt.target);
            break;
          }

        case keycodes.RIGHT:
        case keycodes.DOWN:
          {
            evt.preventDefault();
            focusNextSiblingOf(evt.target);
            break;
          }
      }
    }
  };

  if (rest.id) {
    assertValidHtmlId(rest.id);
  }

  return /*#__PURE__*/createElement("div", _extends({
    className: className
  }, rest, {
    role: "button",
    tabIndex: 0,
    onClick: toggleExpanded,
    onKeyDown: handleKeyPress,
    "data-accordion-component": "AccordionItemButton"
  }));
};

var AccordionItemButtonWrapper = function AccordionItemButtonWrapper(props) {
  return /*#__PURE__*/createElement(Consumer$1, null, function (itemContext) {
    var toggleExpanded = itemContext.toggleExpanded,
        buttonAttributes = itemContext.buttonAttributes;
    return /*#__PURE__*/createElement(AccordionItemButton, _extends({
      toggleExpanded: toggleExpanded
    }, props, buttonAttributes));
  });
};

var defaultProps = {
  className: 'accordion__heading',
  'aria-level': 3
};
var SPEC_ERROR = "AccordionItemButton may contain only one child element, which must be an instance of AccordionItemButton.\n\nFrom the WAI-ARIA spec (https://www.w3.org/TR/wai-aria-practices-1.1/#accordion):\n\n\u201CThe button element is the only element inside the heading element. That is, if there are other visually persistent elements, they are not included inside the heading element.\u201D\n\n";
var AccordionItemHeading = /*#__PURE__*/function (_React$PureComponent) {
  _inherits(AccordionItemHeading, _React$PureComponent);

  var _super = _createSuper(AccordionItemHeading);

  function AccordionItemHeading() {
    var _this;

    _classCallCheck(this, AccordionItemHeading);

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = _super.call.apply(_super, [this].concat(args));

    _defineProperty(_assertThisInitialized(_this), "ref", void 0);

    _defineProperty(_assertThisInitialized(_this), "setRef", function (ref) {
      _this.ref = ref;
    });

    return _this;
  }

  _createClass(AccordionItemHeading, [{
    key: "componentDidUpdate",
    value: function componentDidUpdate() {
      AccordionItemHeading.VALIDATE(this.ref);
    }
  }, {
    key: "componentDidMount",
    value: function componentDidMount() {
      AccordionItemHeading.VALIDATE(this.ref);
    }
  }, {
    key: "render",
    value: function render() {
      return /*#__PURE__*/createElement("div", _extends({
        "data-accordion-component": "AccordionItemHeading"
      }, this.props, {
        ref: this.setRef
      }));
    }
  }], [{
    key: "VALIDATE",
    value: function VALIDATE(ref) {
      if (ref === undefined) {
        throw new Error('ref is undefined');
      }

      if (!(ref.childElementCount === 1 && ref.firstElementChild && ref.firstElementChild.getAttribute('data-accordion-component') === 'AccordionItemButton')) {
        throw new Error(SPEC_ERROR);
      }
    }
  }]);

  return AccordionItemHeading;
}(PureComponent);

_defineProperty(AccordionItemHeading, "defaultProps", defaultProps);

var AccordionItemHeadingWrapper = function AccordionItemHeadingWrapper(props) {
  return /*#__PURE__*/createElement(Consumer$1, null, function (itemContext) {
    var headingAttributes = itemContext.headingAttributes;

    if (props.id) {
      assertValidHtmlId(props.id);
    }

    return /*#__PURE__*/createElement(AccordionItemHeading, _extends({}, props, headingAttributes));
  });
};

AccordionItemHeadingWrapper.displayName = DisplayName$1.AccordionItemHeading;

var _excluded$3 = ["className", "region", "id"];

var AccordionItemPanel = function AccordionItemPanel(_ref) {
  var _ref$className = _ref.className,
      className = _ref$className === void 0 ? 'accordion__panel' : _ref$className,
      region = _ref.region,
      id = _ref.id,
      rest = _objectWithoutProperties(_ref, _excluded$3);

  var renderChildren = function renderChildren(_ref2) {
    var panelAttributes = _ref2.panelAttributes;

    if (id) {
      assertValidHtmlId(id);
    }

    var attrs = _objectSpread2(_objectSpread2({}, panelAttributes), {}, {
      'aria-labelledby': region ? panelAttributes['aria-labelledby'] : undefined
    });

    return /*#__PURE__*/createElement("div", _extends({
      "data-accordion-component": "AccordionItemPanel",
      className: className
    }, rest, attrs, {
      role: region ? 'region' : undefined
    }));
  };

  return /*#__PURE__*/createElement(Consumer$1, null, renderChildren);
};

var AccordionItemState = function AccordionItemState(_ref) {
  var children = _ref.children;

  var renderChildren = function renderChildren(itemContext) {
    var expanded = itemContext.expanded,
        disabled = itemContext.disabled;
    return /*#__PURE__*/createElement(Fragment, null, children({
      expanded: expanded,
      disabled: disabled
    }));
  };

  return /*#__PURE__*/createElement(Consumer$1, null, renderChildren);
};

export { Accordion, AccordionItem, AccordionItemButtonWrapper as AccordionItemButton, AccordionItemHeadingWrapper as AccordionItemHeading, AccordionItemPanel, AccordionItemState, resetGlobalCounterId as resetNextUuid };