Find and replace in template

template.js

/**
 *
 * @param data
 * @returns {string}
 */
let myTemplate = function(data){
  let text  = `
    If you are {full_name} a value (and not a regular expression), 
    only the first {name} of the value will be replaced. 
    To replace all occurrences of a specified value, use the global (g) modifier (see "More Examples" below).   
    Read more about regular expressions in our {text} Tutorial and our RegExp Object Reference.   
    This method does not change the original string {deep.deepProp}.
    `;

  let reg = /\{(.+)\}/ig;
  let test  = text.replace(reg, function(str, find, offset, s) {
    if(find) {
      return deeps(data, find);
    }
  });
  return text;
}


function deeps(obj, val) {
  var hs = val.split('.');
  var len = hs.length;
  var deep;
  var num = 0;
  for (var i = 0; i < len; i++) {
    var el = hs[i];
    if (deep) {
      if (deep[el]) {
        deep = deep[el];
        num++;
      }
    } else {
      if (obj[el]) {
        deep = obj[el];
        num++;
      }
    }
  }
  if (num == len) {
    return deep;
  } else {
    return undefined;
  }
}

myTemplate({
  name: 'Дмитрий',
  full_name: 'Дмитрий Димитрий',
  text: 'что то',
  deep: {
    deepProp: 'deepProp 111'
  }
})