regex - Regular expression in javascript for restricting HTML entites like < - Stack Overflow

admin管理员组

文章数量:1335594

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

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

• javascript
• regex

Share Improve this question Follow edited Jun 25, 2010 at 7:10 Jibu P C_Adoor asked Jun 25, 2010 at 6:47 Jibu P C_AdoorJibu P C_Adoor 3,37499 gold badges3232 silver badges3636 bronze badges 4

• How about ©, 〹, ꯍ and ordinal text like foo? Do you just want to strip HTML tags like <script>? <b>? – kennytm Commented Jun 25, 2010 at 6:54
• No i want accept all the html tags but if it the content is in the encodeed format that should be avoided – Jibu P C_Adoor Commented Jun 25, 2010 at 6:56
• So you want to reject the input if there's <? – kennytm Commented Jun 25, 2010 at 7:01
• exactly,but should not reject '<' or '>' – Jibu P C_Adoor Commented Jun 25, 2010 at 7:05

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 11

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 ment:

   "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]);
}

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

本文标签： regexRegular expression in javascript for restricting HTML entites like ampltStack Overflow