14 lines
363 B
TypeScript
14 lines
363 B
TypeScript
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export function alfanum(username: string) {
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let code, i, len
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for (i = 0, len = username.length; i < len; i++) {
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code = username.charCodeAt(i)
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if (!(code > 47 && code < 58) && // numeric (0-9)
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!(code > 64 && code < 91) && // upper alpha (A-Z)
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!(code > 96 && code < 123)) { // lower alpha (a-z)
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return false
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}
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}
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return true
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}
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