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32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
/**
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* Checks if a value has the shape of a WHATWG URL object.
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*
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* Using a symbol or instanceof would not be able to recognize URL objects
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* coming from other implementations (e.g. in Electron), so instead we are
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* checking some well known properties for a lack of a better test.
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*
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* We use `href` and `protocol` as they are the only properties that are
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* easy to retrieve and calculate due to the lazy nature of the getters.
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*
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* We check for auth attribute to distinguish legacy url instance with
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* WHATWG URL instance.
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*
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* @param {unknown} fileUrlOrPath
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* File path or URL.
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* @returns {fileUrlOrPath is URL}
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* Whether it’s a URL.
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*/
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// From: <https://github.com/nodejs/node/blob/6a3403c/lib/internal/url.js#L720>
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export function isUrl(fileUrlOrPath) {
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return Boolean(
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fileUrlOrPath !== null &&
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typeof fileUrlOrPath === 'object' &&
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'href' in fileUrlOrPath &&
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fileUrlOrPath.href &&
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'protocol' in fileUrlOrPath &&
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fileUrlOrPath.protocol &&
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// @ts-expect-error: indexing is fine.
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fileUrlOrPath.auth === undefined
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)
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}
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