Including if statement

Question

I want my code below to return false and alert the user if they input a username that contains a space.
How would you write it?

if(username INCLUDES “ ”){
alert(“”)
return false;
}

sorry if the title is phrased oddly, I didn’t know how to say it.

https://code.sololearn.com/WtcEEjQV6VOf/?ref=app

Answer 1

Time to learn Regular Expression or Regex in short.
https://www.sololearn.com/learn/9704/?ref=app

The username regex is basically like:

if(!username.match(/[a-zA-Z0-9.\-_$@*!]{3,30}$/)){
alert("Your username must not contain spaces. Must be min 3 max 30 character.")
return false;
}

https://stackoverflow.com/questions/15933727/javascript-regular-expression-for-usernames-no-spaces

Answer 2

Try to add:
if(username.indexOf(" ")!==-1) {
alert("Username must not contain spacing.");
return false;
}

https://code.sololearn.com/WWK6ulX3vhdX/?ref=app

Answer 3

Calviղ Very brilliant soln

Answer 4

Try this:
if(username.match(/\s/) != null){
alert("")
return false;
}