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chore(integration-karma): remove programmatic DSD check #5299

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Merged
wjhsf merged 1 commit into from
Mar 24, 2025
Merged

chore(integration-karma): remove programmatic DSD check #5299

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41 changes: 2 additions & 39 deletions packages/@lwc/integration-karma/helpers/test-hydrate.js
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Original file line number Diff line number Diff line change
Expand Up @@ -10,50 +10,15 @@ window.HydrateTest = (function (lwc, testUtils) {
sanitizeHtmlContent: (content) => content,
});

// As of this writing, Firefox does not support programmatic access to parsing DSD,
// i.e. `Document.parseHTMLUnsafe`
// See: https://developer.mozilla.org/en-US/docs/Web/API/Document/parseHTMLUnsafe_static
function testSupportsProgrammaticDSD() {
const html = '<div><template shadowrootmode="open"></template></div>';
try {
return !!Document.parseHTMLUnsafe(html).body.firstChild.shadowRoot;
} catch (_err) {
return false;
}
}

const browserSupportsProgrammaticDSD = testSupportsProgrammaticDSD();

function parseStringToDom(html) {
if (browserSupportsProgrammaticDSD) {
return Document.parseHTMLUnsafe(html).body.firstChild;
} else {
return new DOMParser().parseFromString(html, 'text/html').body.firstChild;
}
}

function polyfillDeclarativeShadowDom(root) {
root.querySelectorAll('template[shadowrootmode]').forEach((template) => {
const mode = template.getAttribute('shadowrootmode');
const shadowRoot = template.parentNode.attachShadow({ mode });
shadowRoot.appendChild(template.content);
template.remove();

polyfillDeclarativeShadowDom(shadowRoot);
});
return Document.parseHTMLUnsafe(html).body.firstChild;
}

function appendTestTarget(ssrText) {
const div = document.createElement('div');

const testTarget = parseStringToDom(ssrText);
if (!browserSupportsProgrammaticDSD) {
polyfillDeclarativeShadowDom(testTarget);
}
div.appendChild(testTarget);

document.body.appendChild(div);

return div;
}

Expand Down Expand Up @@ -91,7 +56,5 @@ window.HydrateTest = (function (lwc, testUtils) {
return testResult;
}

return {
runTest,
};
return { runTest };
})(window.LWC, window.TestUtils);