I'm trying to make a special input that will check the mask by the pattern of this mask for the correctness of the entered characters. I thought that I need to create an array with regular expressions for each character for the pattern. The pattern should include Latin and Cyrillic characters, spaces, dashes and underscores. I'm trying now to check if the check works, but anything can get into my input. What is the correct way to make sure that it checks the pattern and mask which characters should be included in the input?

export default {
  data: ()=>({
    plate_pattern:{
      app11le: "AAA11AA",
      cherr11y:"AAAA11A",
      a111pricot: "A111AAAAA"
    },
    pattern_key: this.plate_pattern,
    handler: "",
    mask: [{app11le:' ___ __ __'}, {cherr11y: '____ ___'}, {a111pricot: '_ _______'}],
    placeholder: '_',
    start: 0,
    isRight: true,

  }),

 methods:{
    isNumber(checkIfNumber){
      return !isNaN(checkIfNumber) && parseInt(+checkIfNumber) == checkIfNumber() && !isNaN(parseInt(checkIfNumber, 10))
    },
    isLetter(checkIfLetter){
      return isNaN(checkIfLetter) && checkIfLetter.toLowerCase() != checkIfLetter.toLowerCase() && checkIfLetter.length == 1
    },
    isRightSymbol(checkIfSymbolInArray){
      let arraySymbolExist = [
          {name: 'app11le', regex: /^[\wа-я][\wа-я][\wа-я][0-9_][\wа-я][\wа-я]$/, check: true},
        {name:'cherr11y', regex:/^[\wа-я][\wа-я][\wа-я][\wа-я][\wа-я][0-9_][\wа-я]$/, check: true },
        {name:'a111pricot', regex: /^[\wа-я][0-9_][0-9_][0-9_][\wа-я][\wа-я][\wа-я][\wа-я][\wа-я][\wа-я]$/ }
      ]
  if(arraySymbolExist.length){
  for (let i = 0; i < arraySymbolExist.length; i++) {
    return !checkIfSymbolInArray.match(arraySymbolExist[i])
  }
}
    },
    inputFruitName(fruitsName){
      if(this.isNumber(fruitsName.key) || this.isLetter(fruitsName.key) && this.isRightSymbol(fruitsName.key)){
        this.isRight = false;
      }
    },