17 lines
445 B
JavaScript
17 lines
445 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 alphabetical.
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*
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* @param {string|number} character
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* @returns {boolean} Whether `character` is alphabetical.
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*/
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export function isAlphabetical(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 && code <= 122) /* a-z */ ||
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(code >= 65 && code <= 90) /* A-Z */
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)
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}
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