HTML Render Method testing

The HTML Render Method approach uses a sandboxed environment (typically an <iframe> + CSP) to allow JavaScript to be used for rendering (some or all of) a Verifiable Credential into an HTML page.

This allows developers to provide a JavaScript rendering runtime while preventing access to the network for that runtime.

Architecture

graph TD
    subgraph Wallet's VC Rendering HTML
        direction LR
        A(Verifiable Credential) -- selectively disclosed --> B{VC subset}
        subgraph "iframe[srcdoc] w/Render Method HTML"
            B{VC Subset} --> C[JavaScript]
        end
    end

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Demo Components

• index.html - the Wallet/host rendering HTML page
  • has access to complete Verifiable Credential
  • creates <iframe> and sets srcdoc="" on it to the "rendering runtime"
• pointer.js - minimal JSON Pointer parser for handling renderProperty
• render.js - library to create the <iframe>; contains the test template code
• select.js - does the selective disclosure using pointer.js lookups