How to use the roosterjs-editor-dom.Browser.isIE function in roosterjs-editor-dom

private _shouldCallBlurDefault = (nextTarget: HTMLElement): boolean => {
        // don't call blur if the next target is an element on this container
        if (nextTarget && this._containerDiv.contains(nextTarget)) {
            return false;
        }

        // similarly, don't call blur if the next target is the callout or its children
        if (nextTarget == null && Browser.isIE) {
            nextTarget = document.activeElement as HTMLElement;
        }
        if (nextTarget && closest(nextTarget, `.${this._calloutClassName}`)) {
            return false;
        }

        return true;
    };

EditorPlugin,
    isCharacterValue,
    isModifierKey,
} from 'roosterjs-editor-core';

// Character codes.
// IE11 uses different character codes. which are noted below.
// If adding a new key, test in IE to figure out what the code is.
const BACKSPACE_CHARCODE = 'Backspace';
const TAB_CHARCODE = 'Tab';
const ENTER_CHARCODE = 'Enter';
const ESC_CHARCODE = !Browser.isIE ? 'Escape' : 'Esc';
const LEFT_ARROW_CHARCODE = !Browser.isIE ? 'ArrowLeft' : 'Left';
const UP_ARROW_CHARCODE = !Browser.isIE ? 'ArrowUp' : 'Up';
const RIGHT_ARROW_CHARCODE = !Browser.isIE ? 'ArrowRight' : 'Right';
const DOWN_ARROW_CHARCODE = !Browser.isIE ? 'ArrowDown' : 'Down';
const DELETE_CHARCODE = !Browser.isIE ? 'Delete' : 'Del';

// Input event input types.
const DELETE_CONTENT_BACKWARDS_INPUT_TYPE = 'deleteContentBackwards';

// Unidentified key, the code for Android keyboard events.
const UNIDENTIFIED_KEY = 'Unidentified';

/**
 * Interface for PickerPlugin
 */
export interface EditorPickerPluginInterface
    extends EditorPlugin {
    dataProvider: T;
}

} from 'roosterjs-editor-types';
import {
    cacheGetContentSearcher,
    Editor,
    EditorPlugin,
    isCharacterValue,
    isModifierKey,
} from 'roosterjs-editor-core';

// Character codes.
// IE11 uses different character codes. which are noted below.
// If adding a new key, test in IE to figure out what the code is.
const BACKSPACE_CHARCODE = 'Backspace';
const TAB_CHARCODE = 'Tab';
const ENTER_CHARCODE = 'Enter';
const ESC_CHARCODE = !Browser.isIE ? 'Escape' : 'Esc';
const LEFT_ARROW_CHARCODE = !Browser.isIE ? 'ArrowLeft' : 'Left';
const UP_ARROW_CHARCODE = !Browser.isIE ? 'ArrowUp' : 'Up';
const RIGHT_ARROW_CHARCODE = !Browser.isIE ? 'ArrowRight' : 'Right';
const DOWN_ARROW_CHARCODE = !Browser.isIE ? 'ArrowDown' : 'Down';
const DELETE_CHARCODE = !Browser.isIE ? 'Delete' : 'Del';

// Input event input types.
const DELETE_CONTENT_BACKWARDS_INPUT_TYPE = 'deleteContentBackwards';

// Unidentified key, the code for Android keyboard events.
const UNIDENTIFIED_KEY = 'Unidentified';

/**
 * Interface for PickerPlugin
 */
export interface EditorPickerPluginInterface

export function getDefaultContentEditFeatures(): ContentEditFeatures {
    return {
        autoLink: true,
        indentWhenTab: true,
        outdentWhenShiftTab: true,
        outdentWhenBackspaceOnEmptyFirstLine: true,
        outdentWhenEnterOnEmptyLine: Browser.isIE,
        mergeInNewLineWhenBackspaceOnFirstChar: false,
        unquoteWhenBackspaceOnEmptyFirstLine: true,
        unquoteWhenEnterOnEmptyLine: true,
        autoBullet: true,
        tabInTable: true,
        upDownInTable: Browser.isChrome || Browser.isSafari,
        insertLineBeforeStructuredNodeFeature: false,
        defaultShortcut: true,
        unlinkWhenBackspaceAfterLink: false,
        noCycleCursorMove: Browser.isChrome,
        smartOrderedList: false,
        smartOrderedListStyles: ['lower-alpha', 'lower-roman', 'decimal'],
    };
}

Undo
                        
                            {this.renderSpan(format.canUndo, 'Can Undo')}
                            {this.renderSpan(format.canRedo, 'Can Redo')}
                        
                    
                    
                        Browser
                        
                            {this.renderSpan(Browser.isChrome, 'Chrome')}
                            {this.renderSpan(Browser.isEdge, 'Edge')}
                            {this.renderSpan(Browser.isFirefox, 'Firefox')}
                            {this.renderSpan(Browser.isIE11OrGreater, 'IE10/11')}
                            {this.renderSpan(Browser.isIE, 'IE')}
                            {this.renderSpan(Browser.isIEOrEdge, 'IE/Edge')}
                            {this.renderSpan(Browser.isSafari, 'Safari')}
                            {this.renderSpan(Browser.isWebKit, 'Webkit')}
                        
                    
                    
                        OS
                        
                            {this.renderSpan(Browser.isMac, 'MacOS')}
                            {this.renderSpan(Browser.isWin, 'Windows')}
                        
                    
                    
                        User Agent
                        {window.navigator.userAgent}