Virtual pressure sourcesLimited availability
The CreateVirtualPressureSource WebDriver command creates artificial sources of compute pressure for testing without the need real device sources of compute pressure.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–128Not supported
129+Supportedsince Sep 17, 2024
Current: 155Edge
12–128Not supported
129+Supportedsince Sep 19, 2024
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
18–128Not supported
129+Supportedsince Sep 17, 2024
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
✕Not supportedup to 27
Current: 27How to use
Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: CreateVirtualPressureSource.
Feature detection
There’s no simple runtime check for this feature; rely on the support table and test in your target browsers.
Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (3). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| webdriver.classic.CreateVirtualPressureSource | 129 | 129 | ✕ | ✕ | 129 | ✕ | ✕ |
| webdriver.classic.DeleteVirtualPressureSource | 129 | 129 | ✕ | ✕ | 129 | ✕ | ✕ |
| webdriver.classic.UpdateVirtualPressureSource | 129 | 129 | ✕ | ✕ | 129 | ✕ | ✕ |