JSFiddle - React, Tailwind, and code Playground

JavaScript

var name = 'anything';
    var surname = 'anyone';

    var replaced = "My name is < NAME > < SURNAME >"
    .replace(/<[^>]+>/g, 
        function (str)  
        {  
            if (str === '< NAME >')
            {
                return name;
            }
            else if (str === '< SURNAME >')
            {
                return surname;
            }
            else
            {
                return '***error***';
            }
        });
    document.write(replaced);