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Add the most minimal approach available. #3

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Add the most minimal approach available. #3

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53d2fca
Add the most minimal approach available.
BigBlueHat Jan 8, 2026
abe6394
Improve shim code CSP setup.
BigBlueHat Jan 9, 2026
2cdfb05
Add some labels to host page; style to shim.
BigBlueHat Jan 9, 2026
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68 changes: 68 additions & 0 deletions minimal/index.html
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Original file line number Diff line number Diff line change
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<html>
<head>
<meta http-equiv="content-security-policy" content="frame-src 'none'">
</head>
<body>
<h1>Host Page</h1>

<h2>Credential Display</h2>
<iframe id="renderer" sandbox="allow-scripts allow-modals" srcdoc=""></iframe>

<script>
// the *partial* verifiable credential filtered by `renderProperty`
const credential = {
'@context': [
'https://www.w3.org/ns/credentials/v2',
'https://www.w3.org/ns/credentials/examples/v2'
],
type: ['VerifiableCredential', 'NameCredential'],
issuer: {
id: 'did:example:1234',
name: 'The Issuer',
},
credentialSubject: {
name: 'Example Name',
}
};

// template value extracted from the original VC
const template = `
<div>
<style>
body { font-family: Arial, sans-serif; }
h1 { color: darkblue; }
</style>

<h1 id="credentialSubject-name"></h1>
<p>Issued by: <span id="issuer-name"></span></p>

<script>
console.log('running template render script');

// display credential as JSON as an example renderer; anything
// could be done here instead, including mustache/other-style
// template processing to generate the HTML for display
const credential = JSON.parse(document.querySelector(
'head > script[name="credential"]').innerHTML);

document.querySelector('#credentialSubject-name').innerText =
credential.credentialSubject.name;
document.querySelector('#issuer-name').innerText =
credential.issuer.name;
<\/script>
</div>
`;

// Setup the iframe shim code--required for security sandboxing
renderer.srcdoc = `
<html>
<head>
<meta http-equiv="content-security-policy" content="default-src 'none' data: 'unsafe-inline'">
<script name="credential" type="application/vc">${JSON.stringify(credential)}<\/script>
</head>
<body>${template}</body>
</html>
`;
</script>
</body>
</html>