get: (): string => {
   if (className === undefined) {
     // tslint:disable-next-line:no-any
     className = mergeStyles(styles[styleName] as any).toString();
   }
   return className;
 },

export function getIconClassName(name: string): string {
  let className = '';
  const icon = getIcon(name);

  if (icon) {
    className = mergeStyles(
      icon.subset.className,
      {
        selectors: {
          '::before': {
            content: `"${icon.code}"`
          }
        }
      });
  }

  return className;
}

export function getIcon(name?: string): IIconRecord | undefined {
  let icon: IIconRecord | undefined = undefined;
  const options = _iconSettings.__options;

  name = name ? name.toLowerCase() : '';
  name = _iconSettings.__remapped[name] || name;

  if (name) {
    icon = _iconSettings[name!] as IIconRecord;

    if (icon) {
      let { subset } = icon;

      if (subset.fontFace && !subset.isRegistered) {
        // Register font face for given icons.
        fontFace(subset.fontFace);

        // Generate a base class name for the given font.
        subset.className = mergeStyles(
          subset.style,
          {
            fontFamily: subset.fontFace.fontFamily,
            fontWeight: subset.fontFace.fontWeight || 'normal',
            fontStyle: subset.fontFace.fontStyle || 'normal'
          }).toString();

        subset.isRegistered = true;
      }
    } else {
      if (!options.disableWarnings && options.warnOnMissingIcons) {
        warn(`The icon "${name}" was used but not registered. See http://aka.ms/fabric-icon-usage for more information.`);
      }
    }
  }

  return icon;
}

export function getIcon(name?: string): IIconRecord | undefined {
  let icon: IIconRecord | undefined = undefined;

  name = name ? name.toLowerCase() : '';
  name = _icons.__remapped[name] || name;

  if (name) {
    icon = _icons[name!] as IIconRecord;

    if (icon) {
      let { subset } = icon;

      if (!subset.isRegistered) {
        // Register font face for given icons.
        fontFace(subset.fontFace);

        // Generate a base class name for the given font.
        subset.className = mergeStyles(
          subset.style,
          {
            fontFamily: subset.fontFace.fontFamily,
            fontWeight: subset.fontFace.fontWeight || 'normal',
            fontStyle: subset.fontFace.fontStyle || 'normal'
          }).toString();

        subset.isRegistered = true;
      }
    } else {
      if (_icons.__options.warnOnMissingIcons) {
        warn(`The icon "${name}" was referenced but not registered.`);
      }
    }
  }

  return icon;
}

    get: (): string => {
      // tslint:disable-next-line:no-any
      const style: IRawStyle = { [cssProperty]: (getTheme().palette as any)[colorName] };

      return mergeStyles(isHover ? { selectors: { ':hover': style } } : style).toString();
    },

import { getDocument } from './dom';
import { mergeStyles } from '@uifabric/merge-styles/lib/index';

let _scrollbarWidth: number;
let _bodyScrollDisabledCount = 0;

const DisabledScrollClassName = mergeStyles({
  overflow: 'hidden !important' as 'hidden'
});

/**
 * Placing this attribute on scrollable divs optimizes detection to know
 * if the div is scrollable or not (given we can avoid expensive operations
 * like getComputedStyle.)
 *
 * @public
 */
export const DATA_IS_SCROLLABLE_ATTRIBUTE = 'data-is-scrollable';

/**
 * Disables the body scrolling.
 *
 * @public
 */
export function disableBodyScroll(): void {
  let doc = getDocument();

  if (doc && doc.body && !_bodyScrollDisabledCount) {
    doc.body.classList.add(DisabledScrollClassName);
  }