入力ボックスの固定入力の価値形式（金額、特殊文字）を解決するための正規表現

<template>
 <div id="app">
 {{value}}
 <el-input 
  v-model="value" 
  clearable
  size="small"
  class="row-value "
  @input="numCheck(value)"
  // Here I use input, which checks every input, or you can use check when change changes or check when blur loses focus.
  >
  </el-input>
 </div>
</template>

<script>
 export default {
 name: "app",
 data() {
  return { 
  value:''
  };
 },
 methods: {
  numCheck(val){
  if(val ! = ''){
   if (/[^1-9]/.test(val)) {
   //If you can't enter numbers then drop ^, /[1-9]/.test(val)
   //only letters can be entered, /[^A-z]/.test(val)
   //only letters or numbers (like passwords) can be entered, /[^1-9A-z]/).test(val)
   this.$message({
    type: "error",
    message: "Only numbers can be entered, please re-enter! "
   })
   this.value = ''
   }
  }
  }
 }
 };
</script>

if(value > 1){
	this.$message({
  type: "error",
  message: "Please enter a number less than 1! "
 })
 this.value = ''
 return
}
if (! (/^([0-9]*)+(. [0-9]{1,2})? $/).test(val)) {
 this.$message({
  type: "error",
  message: "Please enter two decimal places less than 1! "
 })
 this.value = ''
}

if(value.length > 12){
	this.$message({
  type: "error",
  message: "Length exceeds 12, please retype "
 })
 this.value = ''
 return
}
if(! (/(^[1-9]([0-9]+)? (\. [0-9]{1,2})? $)|(^(0){1}$)|(^[0-9]\. [0-9]([0-9])? $)/).test(value)){
	this.$message({
  type: "error",
  message: "Only numbers can be entered, please re-enter! "
 })
 this.value = ''
}

var patrn = /[`~! @#$%^&*_\-+=<>? "{}|\/;'\\[\]-~! @#$%......&*----\-+={}|The? ""[]'',]/gim;
if (patrn.test(val)) {
 this.$message({
  type: "error",
  message: "Please do not enter special characters! "
 })