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18 lines
503 B
Text
18 lines
503 B
Text
// Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
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// Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
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const ABSOLUTE_URL_REGEX = /^[a-zA-Z][a-zA-Z\d+\-.]*?:/;
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// Windows paths like `c:\`
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const WINDOWS_PATH_REGEX = /^[a-zA-Z]:\\/;
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export default function isAbsoluteUrl(url) {
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if (typeof url !== 'string') {
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throw new TypeError(`Expected a \`string\`, got \`${typeof url}\``);
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}
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if (WINDOWS_PATH_REGEX.test(url)) {
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return false;
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}
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return ABSOLUTE_URL_REGEX.test(url);
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}
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