JSFiddle - React, Tailwind, and code Playground

JavaScript

var replacer = function (str)  
{  
    if (str === '< NAME >')
    {
        return 'anything';
    }
    else
    {
        return 'nothing';
    }
};

document.write("My name is < NAME > < SURNAME >".replace(/<[^>]+>/g, replacer));