w3.org

Choose and convert between WebVTT and TTML/IMSC caption formats to satisfy per-platform delivery requirements from a single auto-generated caption source

Build a multi-DRM license proxy that routes FairPlay SPC, Widevine license challenge, and PlayReady license requests to the correct backend based on the requesting CDM

Convert captions between WebVTT and TTML/IMSC while identifying what is lossy

Configure ClearKey as a testing content-protection mechanism for CENC-encrypted content

choose between WebTransport and WebRTC data channels for realtime browser-to-server data

build a call-quality dashboard from WebRTC RTCPeerConnection.getStats() metrics

Execute the WebAuthn authentication ceremony client-side using navigator.credentials.get and verify the assertion server-side

Implement the WebAuthn Signal API to synchronize server-side passkey revocations to platform passkey providers

Choose and configure attestation conveyance preference (none, indirect, direct, enterprise) in WebAuthn registration

Execute the WebAuthn registration ceremony client-side using navigator.credentials.create with PublicKeyCredentialCreationOptions

Implement the Digital Credentials API (navigator.credentials with DigitalCredential type) for in-browser mDL / VC requests

Implement signature counter clone detection to identify cloned authenticators

Implement passkey autofill (conditional UI) using mediation:'conditional' in navigator.credentials.get

Distinguish and configure platform vs cross-platform authenticator attachment in WebAuthn

Correctly scope relying party ID (rpId) and handle cross-subdomain passkey sharing

Issue and verify a W3C Verifiable Credential using the VC Data Model 2.0

Configure passkey (discoverable/resident credential) registration with residentKey=required and userVerification=required

Understand passkey sync across devices via iCloud Keychain and Google Password Manager

Implement WebAuthn Related Origin Requests (ROR) to share passkeys across related domains

Issue a W3C VC Data Model 2.0 credential with a Data Integrity proof using ECDSA

Add a W3C Bitstring Status List revocation entry to an Open Badges 3.0 credential and update issuer status list document

Issue a W3C Verifiable Credential for a learning achievement using the VC Data Model 2.0 with an education-specific achievement type

Implement a Verifiable Presentation request for education credentials using the W3C Presentation Exchange specification in a hiring platform

Convert SRT subtitles to WebVTT and handle cue formatting differences

Implement badge revocation using the W3C Bitstring Status List in an Open Badges 3.0 issuer