Text replacer, it replaces source string with special keywords on required values

replaceMatches.js

function replaceMatches(template, objReplacer, objData){
    if(typeof template !== "string") return null;
    if(typeof objReplacer !== "object") return template;
    objData = objData || {};
    for(let key of Object.keys(objReplacer)){
        if(!Object.hasOwnProperty.call(objData, key)) continue;
        template = template.replace(new RegExp(objReplacer[key],"g"), objData[key])
    }
    return template;
}

/// Example of usage
let data = {
  name: "dSalieri",
  power: "valuable"
};
let replacer = {
  name: "%userName%",
  power: "%power%"
};
console.log(replaceMatches("My name is %userName%, I'll show you a %power% thing. There was %userName% with you, see you", replacer, data))