18 lines
503 B
JavaScript
18 lines
503 B
JavaScript
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/**
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* Check if the given character code, or the character code at the first
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* character, is hexadecimal.
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*
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* @param {string|number} character
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* @returns {boolean} Whether `character` is hexadecimal
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*/
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export function isHexadecimal(character) {
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const code =
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typeof character === 'string' ? character.charCodeAt(0) : character
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return (
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(code >= 97 /* a */ && code <= 102) /* z */ ||
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(code >= 65 /* A */ && code <= 70) /* Z */ ||
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(code >= 48 /* A */ && code <= 57) /* Z */
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)
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}
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