Answers for "validate if number javascript"

-2

javascript check if number

// The first 2 Variations return a Boolean
// They just work the opposite way around

// IsInteger
if (Number.isInteger(val)) {
	// It is indeed a number
}

// isNaN (is not a number)
if (isNaN(val)) {
	// It is not a number
}

// Another option is typeof which return a string
if (typeof(val) === 'number') {
	// Guess what, it's a bloody number!
}
Posted by: Guest on March-15-2020
5

check if input is a number javascript

// Another option is typeof which return a string
if (typeof(val) === 'number') {
	// Guess what, it's a bloody number!
}
Posted by: Guest on June-27-2020
0

javascript validate number only

function validateNumber(e) {
            const pattern = /^[0-9]$/;

            return pattern.test(e.key )
        }
Posted by: Guest on July-15-2021

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