Thanks to the Format Phone Number in DataPages how-to article, I've formatted all of my phone numbers to use the US national format of (###) ###-####. This is great for readability; however, I have a downstream integration that requires the E.164 international standard format of +[country_code][subscriber_line]. For example, (123) 456-7890 would become +11234567890. So, I essentially need to strip out all non-numeric characters (including white spaces) and prepend "+1". All of my phone numbers are in the US. This may sound easy, but I'm a citizen developer new to JavaScript so any help would be greatly appreciated. Thanks!