Question

Possible Duplicate:
Case insensitive string replacement in JavaScript?

I am trying to highlight part of a string where it is equal to another variable value.

For example

var string = 'This Is A Test String';
var findWord = 'test';

result should be

'This Is A <b>Test</b> String'

Please note the case insensitive and that I require the use of using variables to pass the ‘find/Replace word’

reason I need to do it this was is to keep the exact form/case of the string found where is == to the search word.

In PHP, this works, so basically I’m after the JS equivalent of

preg_replace('/('.$search.')/i','<b>$1</b>',$val['name'])

I’m not good when it comes to regex, this should be simple for someone.

Answer 1

var str = 'This Is A Test String';
var w = 'test';

var result = str.replace(new RegExp(w, 'gi'), function(match) {
  return "<b>" + match + "</b>";
});

EDIT: Or, as suggested by the comment, the last line could be replaced by:

var result = str.replace(new RegExp(w, 'gi'), "<b>$&</b>");