Impact Score: 5/10
Playwright v1.48.0 — Release Notes & Engineering Impact
Source available — automated, not human-reviewed
Component: playwright · Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
⚡ Executive Summary (TL;DR)
Playwright v1.48.0. Source highlight: New methods page.routeWebSocket() and browserContext.routeWebSocket() allow to intercept, modify and mock WebSocket connections initiated in the page. Below is a simple example that mocks WebSocket communication by responding to a `"request"` with a `"response"`.
Who Does This Impact? (Role-Based Analysis)
💻 Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
📊 Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
⚙️ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
📄 View Raw Release Notes (Original Developer Log)
## WebSocket routing
New methods [page.routeWebSocket()](https://playwright.dev/docs/api/class-page#page-route-web-socket) and [browserContext.routeWebSocket()](https://playwright.dev/docs/api/class-browsercontext#browser-context-route-web-socket) allow to intercept, modify and mock WebSocket connections initiated in the page. Below is a simple example that mocks WebSocket communication by responding to a `"request"` with a `"response"`.
```js
await page.routeWebSocket('/ws', ws => {
ws.onMessage(message => {
if (message === 'request')
ws.send('response');
});
});
```
See [WebSocketRoute](https://playwright.dev/docs/api/class-websocketroute) for more details.
## UI updates
- New "copy" buttons for annotations and test location in the HTML report.
- Route method calls like [route.fulfill()](https://playwright.dev/docs/api/class-route#route-fulfill) are not shown in the report and trace viewer anymore. You can see which network requests were routed in the network tab instead.
- New "Copy as cURL" and "Copy as fetch" buttons for requests in the network tab.
## Miscellaneous
- Option [`form`](https://playwright.dev/docs/api/class-apirequestcontext#api-request-context-fetch-option-form) and similar ones now accept [FormData](https://playwright.dev/docs/api/class-formdata).
- New method [page.requestGC()](https://playwright.dev/docs/api/class-page#page-request-gc) may help detect memory leaks.
- New option [`location`](https://playwright.dev/docs/api/class-test#test-step-option-location) to pass custom step location.
- Requests made by [APIRequestContext](https://playwright.dev/docs/api/class-apirequestcontext) now record detailed timing and security information in the HAR.
## Browser Versions
- Chromium 130.0.6723.19
- Mozilla Firefox 130.0
- WebKit 18.0
This version was also tested against the following stable channels:
- Google Chrome 129
- Microsoft Edge 129