Run results for: Check if char is number

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser: Chrome 112

Operating system: Android

Device Platform: Desktop

Date tested: one year ago

Tests:

Number.isNaN + parseInt
Number.isNaN(parseInt("a")); Number.isNaN(parseInt("1"));
String includes
"0123456789".includes("a"); "0123456789".includes("1");
Number.isNaN + casting
Number.isNaN(- -("a")); Number.isNaN(- -("1"));
Equality + casting
-1 < (- -("a")); -1 < (- -("1"));
Regex
/\d/.test("a"); /\d/.test("1");