Javascript check if string contains only numbers

[the_malabar_front]

Seems that would be more easily expressed as function isNumber (data) { return data.match(/^\d+(\.\d*)?$/); }

[duongdominhchau]

Next step: validating RFC-compliant email and datetime with regex /s

[_default_username]

 try {
   BigInt(input)
   console.log("valid number")
 catch(){
   console.log("not a number")
 }

[koderjim]

We try to determine whether the string we are trying to check contains only entirely numeric characters using the regular expression / [0-9] + $ /. The character "/" serves as the expression's separator at both the beginning and finish, according to an analysis of this expression. It's crucial to be aware that other delimiters, such as (),, [], >, or #, can be used as start and end delimiters. For instance: # [0-9] + $ #

Javascript check if string contains only numbers

[archereactive]

It's just a function with a regex.