Regex for Lightning Input in Aura Component

Question

I have one Lightning input in which I have to show the error message if condition is not satisfied.

1.4 characters min

2.12 characters max

3.Allowed characters: Letters (A,B,M....26 capital letters of the English alphabet)

4.Digits (1,2,3....)

5.Dash ( - )

6. It must contain at least 1 digit

Need to check and show different error message for different condition if not satisfied in Aura Component in JS. help with this how can I achieve this in aura

Controller:

  if( 4 > updatedAFName.length )
        {
            let errorMessage= "Le numéro d'adhésion ne peut pas contenir moins de 4 caractères";
            helper.showToast(component, event, helper,afLabel,errorMessage,"error"); 
             component.set("v.isInEditingMode", true);
             component.set("v.isInSavingMode", true);
        }
        else if(updatedAFName.length > 12 )
        {
            let errorMessage= "Le numéro d'adhésion ne peut pas excéder 12 caractères";
            let afLabel= $A.get("$Label.c.TM_B02_APPLICATION_FILE");
            helper.showToast(component, event, helper,afLabel,errorMessage,"error"); 
            
        }
        else{
             if(isChangeAFName) {
                 component.set("v.IsApplicationNumberModalOpen", true);
                 component.set("v.isChangeAFName", true);
                }
                component.set("v.isInEditingMode", true);
                component.set("v.isInSavingMode", true);
                //component.set("v.IsApplicationNumberModalOpen", true);
            }```

Answer 1

To check length use below:

if(stringToCheck.length < 4 || stringToCheck.length > 12){
 //throw error
}

---

To not allow small letters a-z use below:

const regex = /[a-z]/;
if(regex2.test(stringToCheck)){
 //if a-z is entered throw error
 //this will allow A-Z, 0-9, '-'.... 
 //throw error
}

---

To must contain at least one digit use below:

const regex = /\d/;
if(!regex2.test(stringToCheck)){
 //if no digit is entered throw error
 //throw error
}