@atlaskit/page-layout/dist/es2019/common/get-left-panel-width.js

A collection of components which let you compose an application's page layout.

import { LEFT_PANEL_WIDTH } from './constants';
export const getLeftPanelWidth = () => {
  if (typeof window === 'undefined') {
    return 0;
  }
  return parseInt(window.getComputedStyle(document.documentElement).getPropertyValue(`--${LEFT_PANEL_WIDTH}`), 10) || 0;
};