Regular expression in javascript for restricting HTML entites like <

Question

Hii,

I want to restrict the html entities like '<' , ">" , "&"etc but it should accept '<' and '>' when i click on a button from the javascript. Can anybody gives me the regular expression for that

Answer 1

maybe that?

function remove() {
  var buffer = document.getElementById("parent").innerHTML;
  buffer = buffer.replace(/'<'/, "");
  buffer = buffer.replace(/'>'/, "");
  buffer = buffer.replace(/'&'/, "");
  document.getElementById("parent").innerHTML = buffer;
}

just adujst the id

Answer 2

Updated regex for all entities, including numeric...

Javascript like:

var StrippedStr = YourStrVar.replace (/&#{0,1}[a-z0-9]+;/ig, "");

will strip just about every non-numeric html entity.

.

UPDATE:

Based on comment:

   "but i want to identify the specified string contains <"

.

You can test for entities with:

var HasEntity = /&#{0,1}[a-z0-9]+;/i. test (YourStrVar);

.

You can get a list of the entities with:

var ListOfEntities = YourStrVar.match (/&#{0,1}[a-z0-9]+;/ig);

for (var J=0;  J < ListOfEntities.length;  J++)
{
    alert ('Entity ' + (J+1) + '= ' + ListOfEntities[J]);
}