Remove or replace +1 from the string : JavaScript

I am applying phone number masking on a phone number. I want to make sure that there is no +1 in the beginning and if there is remove it. What would be the best way to do that?

self.phoneNumberMasking = function (data) {
        if (data != "" && data != null) {
            var x = data.replace(/\D/g, '').match(/(\d{3})(\d{3})(\d{4})/);
            data = '+1(' + x[1] + ')' + x[2] + '-' + x[3];
            return data;
        }
        return data;
    }

Since I am not removing or replacing +1 in the above code, it is adding another 1 when I try to apply the mask on a number that already has +1 in it.

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