Deep Dive Topics

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Simulating HTML5 Drag and Drop in Playwright

Simulating HTML5 Drag and Drop in Playwright Drag-and-drop looks like a single gesture to a user, but to the browser it is a sequence of pointer and dragstart / dragover / drop ev...

Automating File Downloads and Verifying Contents

Automating File Downloads and Verifying Contents A test that clicks "Export CSV" and stops there proves nothing — the button might trigger an empty file, the wrong columns, or a s...

Handling Multiple File Uploads in Playwright

Handling Multiple File Uploads in Playwright A file input that accepts several files at once is one of the easiest controls to automate badly. The native OS picker cannot be drive...

Automating Multi-Step Forms with Playwright

Automating Multi-Step Forms with Playwright A multi-step form wizard packs every hard synchronization problem into one workflow. Each step unmounts and remounts a container, navig...

Handling Dropdowns, Checkboxes, and Radio Buttons

Handling Dropdowns, Checkboxes, and Radio Buttons Form controls split into two worlds: native HTML elements the browser renders itself, and custom widgets built from <div> s and A...

Intercepting and Modifying Network Requests

Intercepting and Modifying Network Requests Mocking replaces a response wholesale, but many tests need the real server's data with a small change applied in flight: an auth header...

Mocking API Responses with Playwright

Mocking API Responses with Playwright End-to-end tests that hit a live backend inherit every weakness of that backend: variable latency, shifting seed data, rate limits, and outag...

Configuring Retries and Timeouts for Stable CI

Configuring Retries and Timeouts for Stable CI Timeouts and retries are the safety valves that keep a suite green on slow, contended CI hardware without papering over real bugs. S...

Detecting and Fixing Flaky Playwright Tests

Detecting and Fixing Flaky Playwright Tests A test that fails one run in fifty is invisible to a single CI pass, so the first job is to make the flakiness reproduce on demand. Onc...

Capturing Screenshots and Video on Test Failure

Capturing Screenshots and Video on Test Failure When a test fails on CI you were not watching, the only way to understand it is the evidence the run left behind. Playwright can re...