I)
  * [ Performance API ](/en-US/docs/Web/API/Performance_API)
  * [ Periodic Background Sync ](/en-US/docs/Web/API/Web_Periodic_Background_Synchronization_API) Experimental 
  * [ Permissions API ](/en-US/docs/Web/API/Permissions_API)
  * [ Picture-in-Picture API ](/en-US/docs/Web/API/Picture-in-Picture_API)
  * [ Pointer Events ](/en-US/docs/Web/API/Pointer_events)
  * [ Pointer Lock API ](/en-US/docs/Web/API/Pointer_Lock_API)
  * [ Popover API ](/en-US/docs/Web/API/Popover_API)
  * [ Presentation API ](/en-US/docs/Web/API/Presentation_API) Experimental 
  * [ Prioritized Task Scheduling API ](/en-US/docs/Web/API/Prioritized_Task_Scheduling_API)
  * [ Push API ](/en-US/docs/Web/API/Push_API)

###  R

  * [ Remote Playback API ](/en-US/docs/Web/API/Remote_Playback_API)
  * [ Reporting API ](/en-US/docs/Web/API/Reporting_API) Experimental 
  * [ Resize Observer API ](/en-US/docs/Web/API/Resize_Observer_API)

###  S

  * [ SVG ](/en-US/docs/Web/API/SVG_API)
  * [ Screen Capture API ](/en-US/docs/Web/API/Screen_Capture_API)
  * [ Screen Orientation API ](/en-US/docs/Web/API/Screen_Orientation_API)
  * [ Screen Wake Lock API ](/en-US/docs/Web/API/Screen_Wake_Lock_API)
  * [ Selection API ](/en-US/docs/Web/API/Selection_API)
  * [ Sensor API ](/en-US/docs/Web/API/Sensor_APIs)
  * [ Server Sent Events ](/en-US/docs/Web/API/Server-sent_events)
  * [ Service Workers API ](/en-US/docs/Web/API/Service_Worker_API)
  * [ Shared Storage API ](/en-US/docs/Web/API/Shared_Storage_API) Experimental 
  * [ Speculation Rules API ](/en-US/docs/Web/API/Speculation_Rules_API) Experimental 
  * [ Storage ](/en-US/docs/Web/API/Storage_API)
  * [ Storage Access API ](/en-US/docs/Web/API/Storage_Access_API)
  * [ Streams ](/en-US/docs/Web/API/Streams_API)

###  T

  * [ Topics API ](/en-US/docs/Web/API/Topics_API) Experimental  Non-standard 
  * [ Touch Events ](/en-US/docs/Web/API/Touch_events)
  * [ Trusted Types API ](/en-US/docs/Web/API/Trusted_Types_API)

###  U

  * [ UI Events ](/en-US/docs/Web/API/UI_Events)
  * [ URL API ](/en-US/docs/Web/API/URL_API)
  * [ URL Pattern API ](/en-US/docs/Web/API/URL_Pattern_API) Experimental 
  * [ User-Agent Client Hints API ](/en-US/docs/Web/API/User-Agent_Client_Hints_API) Experimental 

###  V

  * [ Vibration API ](/en-US/docs/Web/API/Vibration_API)
  * [ View Transitions API ](/en-US/docs/Web/API/View_Transitions_API) Experimental 
  * [ VirtualKeyboard API ](/en-US/docs/Web/API/VirtualKeyboard_API) Experimental 
  * [ Visual Viewport ](/en-US/docs/Web/API/Visual_Viewport_API)

###  W

  * [ Web Animations ](/en-US/docs/Web/API/Web_Animations_API)
  * [ Web Audio API ](/en-US/docs/Web/API/Web_Audio_API)
  * [ Web Authentication API ](/en-US/docs/Web/API/Web_Authentication_API)
  * [ Web Components ](/en-US/docs/Web/API/Web_components)
  * [ Web Crypto API ](/en-US/docs/Web/API/Web_Crypto_API)
  * [ Web Locks API ](/en-US/docs/Web/API/Web_Locks_API)
  * [ Web MIDI API ](/en-US/docs/Web/API/Web_MIDI_API)
  * [ Web NFC API ](/en-US/docs/Web/API/Web_NFC_API) Experimental 
  * [ Web Notifications ](/en-US/docs/Web/API/Notifications_API)
  * [ Web Serial API ](/en-US/docs/Web/API/Web_Serial_API) Experimental 
  * [ Web Share API ](/en-US/docs/Web/API/Web_Share_API)
  * [ Web Speech API ](/en-US/docs/Web/API/Web_Speech_API)
  * [ Web Storage API ](/en-US/docs/Web/API/Web_Storage_API)
  * [ Web Workers API ](/en-US/docs/Web/API/Web_Workers_API)
  * [ WebCodecs API ](/en-US/docs/Web/API/WebCodecs_API)
  * [ WebGL ](/en-US/docs/Web/API/WebGL_API)
  * [ WebGPU API ](/en-US/docs/Web/API/WebGPU_API) Experimental 
  * [ WebHID API ](/en-US/docs/Web/API/WebHID_API) Experimental 
  * [ WebOTP API ](/en-US/docs/Web/API/WebOTP_API)
  * [ WebRTC ](/en-US/docs/Web/API/WebRTC_API)
  * [ WebSockets API ](/en-US/docs/Web/API/WebSockets_API)
  * [ WebTransport API ](/en-US/docs/Web/API/WebTransport_API)
  * [ WebUSB API ](/en-US/docs/Web/API/WebUSB_API) Experimental 
  * [ WebVR API ](/en-US/docs/Web/API/WebVR_API) Non-standar