Question

I am trying to learn if there is a javascript method to search a string to see if that string contains any of the values in an array of strings.

An example would be:

var a = 'How now brown cow';
var b = new Array('red', 'green', 'brown');

The resulting function would return true because the word brown is contained within the string a .

More specifically what I am trying to do (except using values from form input) is:

var a = '[e-mail]';
var b = new Array('.com', '.net', '.org');

This should also return true. Then based on this I will go on to accept var a as valid.

My actual code as of right now (which always returns null) is as follows:

function check_domain(){
  for(var i=0; i<domains.length; i++){
    var d = domains[i];
    if(elemen.value.indexOf(d) != d){
      return null;
    }
    else{
      vEmail.style.visibility = 'visible';
    }
  }
}

  window.domains = new Array(....Array values here....);

Answer 1

Not sure why you’ve got .indexOf(d) != d. Shouldn’t it be:

function check_domain(){
   var d, i;
   for(i = 0; i < domains.length; i++){
      d = domains[i];
      if(elemen.value.indexOf(d) != -1) {
        return true;
      }
   }
}