Is there any function for checking the string parameter contains only numbers or not in JavaScript? [duplicate]

Question

I need to create a function that will get parameters as string and check if that string param contains only numbers or not. I tried doing this but I m not sure of the REGEX value.

function validateNum(x) {
  var regex = /^\d+$/

  var isValid = regex.test(x.value);
  if (isValid) {
    console.log("This is a Number. Thus, Accepted!.");
  } else {
    console.log("Only Numbers allowed.");
  }
  return isValid;
}
console.log(validateNum("12x3aj")) //Only Numbers allowed.
console.log(validateNum("12345")) //This is a Number. Thus, Accepted!.

Can anyone help me in this?

Strings don't have a value property. Just use regex.test(x) — Barmar
– Barmar, Commented Mar 1, 2020 at 7:14

Zazaeil · Accepted Answer · 2020-03-01 07:15:22Z

-1

Seems you wanna something like Array.from(myString).every(Number.isInteger).

answered Mar 1, 2020 at 7:15

Zazaeil

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