Playwright MCP Server

import { SessionManager } from '../session-manager.js'; import { ErrorResponse } from '../errors.js'; export interface SwitchPageArgs { sessionId: string; pageIndex: number; } export async function handleSwitchPage( sessionManager: SessionManager, args: any ): Promise<any> { const { sessionId, pageIndex } = args as SwitchPageArgs; const validation = sessionManager.validateSession(sessionId); if (!validation.valid) { return { content: [{ type: 'text', text: JSON.stringify(validation.error) }], isError: true, }; } const session = sessionManager.getSession(sessionId); if (!session) { return { content: [ { type: 'text', text: JSON.stringify({ errorCode: 'SESSION_NOT_FOUND', message: `Session not found: ${sessionId}`, } as ErrorResponse), }, ], isError: true, }; } try { const pages = session.context.pages(); if (pageIndex < 0 || pageIndex >= pages.length) { return { content: [ { type: 'text', text: JSON.stringify({ errorCode: 'INVALID_PAGE_INDEX', message: `Invalid page index: ${pageIndex}. Valid range: 0-${pages.length - 1}`, sessionId, } as ErrorResponse), }, ], isError: true, }; } const targetPage = pages[pageIndex]; if (targetPage.isClosed()) { return { content: [ { type: 'text', text: JSON.stringify({ errorCode: 'PAGE_CLOSED', message: `Page at index ${pageIndex} is already closed`, sessionId, } as ErrorResponse), }, ], isError: true, }; } // Switch to the target page session.page = targetPage; await targetPage.bringToFront(); const url = targetPage.url(); const title = await targetPage.title().catch(() => ''); return { content: [ { type: 'text', text: JSON.stringify({ success: true, sessionId, pageIndex, url, title, }), }, ], }; } catch (error: any) { return { content: [ { type: 'text', text: JSON.stringify({ errorCode: 'SWITCH_PAGE_FAILED', message: error.message || 'Failed to switch page', sessionId, } as ErrorResponse), }, ], isError: true, }; } }