how to detect integer javascript code example
Example 1: javascript check if number
function isNumber(n) { return /^-?[\d.]+(?:e-?\d+)?$/.test(n); }
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isNumber('123');
isNumber('123abc');
isNumber(5);
isNumber('q345');
isNumber(null);
isNumber(undefined);
isNumber(false);
isNumber(' ');
Example 2: javascript check if a value is a integer number
Number.isInteger(123)
Number.isInteger(-123)
Number.isInteger(5-2)
Number.isInteger(0)
Number.isInteger(0.5)
Number.isInteger('123')
Number.isInteger(false)
Number.isInteger(Infinity)
Number.isInteger(-Infinity)
Number.isInteger(0 / 0)