Escapting backslash character in jquery

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Javascript

jQuery

I am using 'highlight textarea' jquery plugin. I need to pass a regex in jquery. But jquery not recognising backslash character even if I use another backslash to escape it.All other special characters works fine except backslash.

$('#demo4').highlightTextarea({
          words: ['\(.+?)}'],
          debug: true
      });

if I use below regex to get a string between {},it works fine.

words: ['{(.+?)}']

,
But to get a string between \},its not recognising this \ character, even the regex is

words: ['\\(.+?)}]

So how to use backslash to be recognised in this regex.
Any help will be greatly appreciated