30秒学会 JavaScript 片段 – String is alpha

Checks if a string contains only alpha characters.

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

代码实现

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

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

翻译自：https://www.30secondsofcode.org/js/s/is-alpha