awesome-string
Version:
The ultimate JavaScript string library
26 lines (25 loc) • 672 B
JavaScript
import coerceToString from 'helper/string/coerce_to_string';
import { REGEXP_DIGIT } from 'helper/reg_exp/const';
/**
* Checks whether `subject` contains only digit characters.
*
* @function isDigit
* @static
* @since 1.0.0
* @memberOf Query
* @param {string} [subject=''] The string to verify.
* @return {boolean} Returns `true` if `subject` contains only digit characters or `false` otherwise.
* @example
* as.isDigit('35');
* // => true
*
* as.isDigit('1.5');
* // => false
*
* as.isDigit('ten');
* // => false
*/
export default function isDigit(subject) {
const subjectString = coerceToString(subject);
return REGEXP_DIGIT.test(subjectString);
}