js determines whether there is a character in the string string?

Vue.filter('howManyPeopleDiff', function (str) {
    
    
  var perNum='';
  if(str.search("1") != -1){
    
    
    perNum+= 'a'
  }
  if(str.search("2") != -1){
    
    
    perNum+= 'b'
  }
  if(str.search("3") != -1){
    
    
    perNum += 'c'
  }
  if(str.search("4") != -1){
    
    
    perNum += 'd'
  }
  if(str.search("5") != -1){
    
    
    perNum+= 'e'
  }
  if(str.search("6") != -1){
    
    
    perNum+= 'f'
  }
  return perNum;
});

return perNumThe return value of · For example,

• For example (call and corresponding return):,
  {(1,2) | howManyPeopleDiff}// return ab
{(3,4) | howManyPeopleDiff}, // return cd
{(1,2,3,4) | howManyPeopleDiff}// returnabcd
• and many more;

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• Blogger's own retention: call method, see the code file corresponding to the remark project file for details.

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