Puppeteer: BiDi only allows domain partition keys

The BiDi cookie conversion accepts a string domain partition key, not an unsupported key shape.

Error message

BiDi only allows domain partition keys

How this error happens

The BiDi Page.setCookie conversion in this path only accepts a string partition key. Passing a composite CDP-style object fails its shape check.

The snippets use a WebDriver BiDi page named page.

await page.setCookie({
    name: "preference",
    value: "dark",
    url: "https://example.com",
    partitionKey: {
        sourceOrigin: "https://example.com",
        hasCrossSiteAncestor: false,
    },
});

How to fix

Use a string key if a top-level-site-only partition is appropriate for your task.

await page.setCookie({
    name: "preference",
    value: "dark",
    url: "https://example.com",
    partitionKey: "https://example.com",
});

Things to keep in mind

This is not an equivalent replacement for a composite key with a cross-site-ancestor requirement. Use a browser/protocol path that supports that requirement instead of dropping cookie isolation.

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