GitHub 6248★

Check if a string contains only digits

JavaScript version

const isNumeric = (str) => !/[^0-9]/.test(str);

TypeScript version

const isNumeric = (str: string): boolean => !/[^0-9]/.test(str);

Examples

isNumeric(2); // true
isNumeric('23'); // true
isNumeric('00123'); // true

isNumeric('1.23'); // false
isNumeric('-Infinity'); // false
isNumeric('Infinity'); // false
isNumeric('NaN'); // false
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