1

i want to replace all < in a string with &lt and insert it into MongoDB.
But when i insert it, MongoDB automatically replace &lt with <.
How can i do to prevent it?
This is the code for replace all < with the escaping quote:

let desc;

splitDesc.forEach(element => {
   if(element == "<") {
        desc += "&lt";
   } else if(element != "<") {
        desc += element;
   }
});
Improve this question
6
  • 1
    &amp would never be replaced with <. I could see &lt getting converted to <, or &amp converted to &, but that makes no sense. You probably have a different error Commented Jun 4, 2021 at 17:13
  • @GarrGodfrey oh yes sorry. I have the same problem with &lt. Commented Jun 4, 2021 at 17:28
  • 1
    you may need to show more code, like your actual update. I'm concerned by your else statement, since the if is unnecessary. Is it possible the &lt is converted to < only when you view it, if you are viewing in a web browser? Commented Jun 4, 2021 at 17:37
  • 1
    since desc starts out as undefined, it will still be undefined even after appending to it. So this code actually does nothing. Commented Jun 4, 2021 at 17:38
  • 1
    @GarrGodfrey I think it'd just coerce undefined to a string; you'd end up with a string prefixed by "undefined" plus everything else appended to it. Commented Jun 4, 2021 at 17:45
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