CODEWITHSUNDEEP
jquery
Rudy Reus
Rudy Reus

Reputation: 51

Regex: How to prevent multiple whitespace for an input

$("input[name='ipt1']").on("keypress", function() {
  var regex = new RegExp(//regex syntax);
  if (regex.test(str)) {
       return true;
  }
  else {
       return false;
  }
});

Based on the above jquery, what are the most efficient way to filter any double whitespace for the input name ipt1

Upvotes: 0

Views: 1019

Answers (2)

Aparajit P Utpat
Aparajit P Utpat

Reputation: 385

There is no need to use regex for input as simple as double spaces. You can use indexOf as below

 $("input[name='ipt1']").on("keyup", function() {
  if($(this).val().indexOf('  ') >= 0) {
   console.log('true');
   return true;
  } else {
   console.log('false');
   return false;
  }
 });

Upvotes: 1

SharifClick
SharifClick

Reputation: 36

The simplest way is (If have double whitespaces - returns true)

  var str = "Lorem ipsum dolor sit amet"; // one whitespace

  var regex = new RegExp(/\s{2}/, 'g');
  if (regex.test(str)) {
       return true;
  }
  else {
       return false; // retuns false
  }

double whitespaces or multiple whitespaces

  var str = "Lorem  ipsum dolor sit amet"; // double whitespaces, also works for multiple whitespaces
  var regex = new RegExp(/\s{2}/, 'g');
  if (regex.test(str)) {
       return true; // retuns true
  }
  else {
       return false; 
  }

Upvotes: 0

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