<script>
  var container = document.createElement("div");

  function safe_tags_regex(str) {
   return str.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
  }
  
  function safe_tags_dom(str) {
   var div = document.createElement('div');
   div.appendChild(document.createTextNode(str));
   return div.innerHTML;
  }
  
  function safe_tags_dom2(str) {
   container.textContent = str;
   return container.innerHTML;
  }
  
  var tagsToReplace = {
   '&': '&amp;',
   '<': '&lt;',
   '>': '&gt;'
  };
  
  function replaceTag(tag) {
   return tagsToReplace[tag] || tag;
  }
  
  function safe_tags_replace(str) {
   return str.replace(/[&<>]/g, replaceTag);
  }
</script>

Setup JS

Teardown JS

Test cases

Test #1

Title *

Async

Code *var test = safe_tags_regex('if (a < b && c > d) {} // Héllö naõ');

Test #2

Title *

Async

Code *var test = safe_tags_dom('if (a < b && c > d) {} // Héllö naõ');

Test #3

Title *

Async

Code *var test = safe_tags_replace('if (a < b && c > d) {} // Héllö naõ');

Test #4

Title *

Async

Code *var test = safe_tags_dom2('if (a < b && c > d) {} // Héllö naõ');

Test case details

Preparation Code

Test cases

Test #1

Test #2

Test #3

Test #4