check if input value has a number javascript code example
Example 1: 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!
}
Example 2: js check if string or int
var myString = "abc123";
var otherString = "123";
/* isInterger() checks if an value repersents an int */
Number.isInteger(myString); //returns false
Number.isInteger(otherString); //returns true