Function isNumber

EN: Check whether it is a right number.

ZH: 判断是否有效数字。

Usage:

const ret1 = isNumber(123);
const ret2 = isNumber('123');
// Default: NaN, Infinity is not Number
const ret3 = isNumber(Infinity);
const ret4 = isNumber(Infinity, { isInfinityAsNumber: true });
const ret5 = isNumber(NaN);
const ret6 = isNumber(NaN, { isNaNAsNumber: true, isInfinityAsNumber: true });
console.log(ret1, ret2, ret3, ret4, ret5, ret6);
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Output:

true false false true false true
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