Process Template

main.js

function processTemp(tempString, dataObject) {
  for(var key in dataObject) {
    if (dataObject.hasOwnProperty(key)) {
      tempString = tempString.replace(new RegExp('{' + key + '}', 'g'), dataObject[key]);
    }
  }
  return tempString;
}

var str = 'Hello {name}';
var data = {
  name: 'Alex'
};

var result = processTemp(str, data);

console.log(result);