ESlint is introduced into vue
`if (queryString = undefined) {
    queryString = "";
  }`
  
  
  Assignment to function parameter "queryString" ESlint is introduced into vue
`if (queryString = undefined) {
    queryString = "";
  }`
  
  
  Assignment to function parameter "queryString" does not recommend assigning values to parameters of function. Set a new variable to do this