String is alpha

JavaScript, String, Regexp · Dec 31, 2020

Checks if a string contains only alpha characters.

Use RegExp.prototype.test() to check if the given string matches against the alphabetic regexp pattern.

const isAlpha = str => /^[a-zA-Z]*$/.test(str);

isAlpha('sampleInput'); // true
isAlpha('this Will fail'); // false
isAlpha('123'); // false

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