WebDriver is the API for remote-controlling a Browser process, as used by WebPlatformTests. It has a lot of different endpoints, so to make it clear which ones are missing, here's a handy list!

To add an endpoint you'll need to modify the code in two places: The WebDriver end at Userland/Services/WebDriver, and the Browser end at Userland/Services/WebContent/WebDriver*. Comment here or refer to this issue in your PR to get your endpoints checked off the list. :^)

You can find the same table in the spec at https://w3c.github.io/webdriver/#endpoints

• POST /session New Session
• DELETE /session/{session id} Delete Session
• GET /status Status
• GET /session/{session id}/timeouts Get Timeouts
• POST /session/{session id}/timeouts Set Timeouts
• POST /session/{session id}/url Navigate To
• GET /session/{session id}/url Get Current URL
• POST /session/{session id}/back Back
• POST /session/{session id}/forward Forward
• POST /session/{session id}/refresh Refresh
• GET /session/{session id}/title Get Title
• GET /session/{session id}/window Get Window Handle
• DELETE /session/{session id}/window Close Window
• POST /session/{session id}/window Switch To Window
• GET /session/{session id}/window/handles Get Window Handles
• POST /session/{session id}/window/new New Window
• POST /session/{session id}/frame Switch To Frame
• POST /session/{session id}/frame/parent Switch To Parent Frame
• GET /session/{session id}/window/rect Get Window Rect
• POST /session/{session id}/window/rect Set Window Rect
• POST /session/{session id}/window/maximize Maximize Window
• POST /session/{session id}/window/minimize Minimize Window
• POST /session/{session id}/window/fullscreen Fullscreen Window
• GET /session/{session id}/element/active Get Active Element
• GET /session/{session id}/element/{element id}/shadow Get Element Shadow Root
• POST /session/{session id}/element Find Element
• POST /session/{session id}/elements Find Elements
• POST /session/{session id}/element/{element id}/element Find Element From Element
• POST /session/{session id}/element/{element id}/elements Find Elements From Element
• POST /session/{session id}/shadow/{shadow id}/element Find Element From Shadow Root
• POST /session/{session id}/shadow/{shadow id}/elements Find Elements From Shadow Root
• GET /session/{session id}/element/{element id}/selected Is Element Selected
• GET /session/{session id}/element/{element id}/attribute/{name} Get Element Attribute
• GET /session/{session id}/element/{element id}/property/{name} Get Element Property
• GET /session/{session id}/element/{element id}/css/{property name} Get Element CSS Value
• GET /session/{session id}/element/{element id}/text Get Element Text
• GET /session/{session id}/element/{element id}/name Get Element Tag Name
• GET /session/{session id}/element/{element id}/rect Get Element Rect
• GET /session/{session id}/element/{element id}/enabled Is Element Enabled
• GET /session/{session id}/element/{element id}/computedrole Get Computed Role
• GET /session/{session id}/element/{element id}/computedlabel Get Computed Label
• POST /session/{session id}/element/{element id}/click Element Click
• POST /session/{session id}/element/{element id}/clear Element Clear
• POST /session/{session id}/element/{element id}/value Element Send Keys
• GET /session/{session id}/source Get Page Source
• POST /session/{session id}/execute/sync Execute Script
• POST /session/{session id}/execute/async Execute Async Script
• GET /session/{session id}/cookie Get All Cookies
• GET /session/{session id}/cookie/{name} Get Named Cookie
• POST /session/{session id}/cookie Add Cookie
• DELETE /session/{session id}/cookie/{name} Delete Cookie
• DELETE /session/{session id}/cookie Delete All Cookies
• POST /session/{session id}/actions Perform Actions
• DELETE /session/{session id}/actions Release Actions
• POST /session/{session id}/alert/dismiss Dismiss Alert
• POST /session/{session id}/alert/accept Accept Alert
• GET /session/{session id}/alert/text Get Alert Text
• POST /session/{session id}/alert/text Send Alert Text
• GET /session/{session id}/screenshot Take Screenshot
• GET /session/{session id}/element/{element id}/screenshot Take Element Screenshot
• POST /session/{session id}/print Print Page