| abortcontroller/ | - | |
| abortsignal/ | - | |
| absoluteorientationsensor/ | - | |
| abstractrange/ | - | |
| accelerometer/ | - | |
| aescbcparams/ | - | |
| aesctrparams/ | - | |
| aesgcmparams/ | - | |
| aeskeygenparams/ | - | |
| ambientlightsensor/ | - | |
| analysernode/ | - | |
| angle_instanced_arrays/ | - | |
| animation/ | - | |
| animationeffect/ | - | |
| animationevent/ | - | |
| animationplaybackevent/ | - | |
| animationtimeline/ | - | |
| atob/ | - | |
| attr/ | - | |
| audio_output_devices_api/ | - | |
| audiobuffer/ | - | |
| audiobuffersourcenode/ | - | |
| audiocontext/ | - | |
| audiodata/ | - | |
| audiodecoder/ | - | |
| audiodestinationnode/ | - | |
| audioencoder/ | - | |
| audiolistener/ | - | |
| audionode/ | - | |
| audioparam/ | - | |
| audioparamdescriptor/ | - | |
| audioparammap/ | - | |
| audioprocessingevent/ | - | |
| audioscheduledsourcenode/ | - | |
| audiosinkinfo/ | - | |
| audiotrack/ | - | |
| audiotracklist/ | - | |
| audioworklet/ | - | |
| audioworkletglobalscope/ | - | |
| audioworkletnode/ | - | |
| audioworkletprocessor/ | - | |
| authenticatorassertionresponse/ | - | |
| authenticatorattestationresponse/ | - | |
| authenticatorresponse/ | - | |
| background_fetch_api/ | - | |
| background_synchronization_api/ | - | |
| background_tasks_api/ | - | |
| backgroundfetchevent/ | - | |
| backgroundfetchmanager/ | - | |
| backgroundfetchrecord/ | - | |
