The Playwright Playbook — Part 2: Network Interception — The Complete Guide

Short summary

Network interception in Playwright lets you mock APIs, simulate error states, and test frontend behavior independently of your backend server. Use page.route() to fulfill mock responses, abort requests, and assert on what your app sends; includes patterns for testing 500 errors, 404s, timeouts, and network failures. This advanced skill separates intermediate Playwright users from experts, enabling complete frontend test coverage without a live backend.

• •Mock API responses without a running backend using page.route()
• •Simulate error states (500, 404, timeouts) and test error handling
• •Assert on exact API calls your app makes before they reach the server

Generated with AI, which can make mistakes.