24 lines
472 B
JavaScript
24 lines
472 B
JavaScript
module.exports = username => {
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if (!username) {
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return false;
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}
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if (username.length < 8 && username.length > 100) {
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return false;
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}
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if (!isAlpha(username)) {
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return false;
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}
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return true;
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}
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const isAlpha = (str) => {
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//starting from beginning ^
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//to the end $
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//check first letter is alpha or underscore [A-Za-z_]
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//check the remaining 0 or more (*) letters are alpha, numeric or underscore [A-Za-z0-9_]
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return /^[A-Za-z_][A-Za-z0-9_]*$/.test(str);
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}
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