Replace all values of the string type of the object with the target value

objectDeepReplace.js

objectDeepReplace = (obj, searchRegex, replaceValue) => {
  for (const key in obj) {
    if (typeof obj[key] === 'string') {
      obj[key] = obj[key].replace(searchRegex, replaceValue);
    } else if (typeof obj[key] === 'object') {
      objectDeepReplace(obj[key], searchRegex, replaceValue);
    }
  }
  return obj;
};

const demoObject = {
  hi: 'Hello world!',
  hello: ['Hello World!', 'Hello，friend!'],
  say: {
    hi: 'Hello world!',
    hello: ['Hello World!', 'Hello，friend!'],
  },
};

console.log(objectDeepReplace(demoObject, /Hello/g, 'Helloo'));

// follow is the output:
// {"hi":"Helloo world!","hello":["Helloo World!","Helloo，friend!"],"say":{"hi":"Helloo world!","hello":["Helloo World!","Helloo，friend!"]}}