Snake to camel case object keys in javascript

snake-to-camel-object-keys.js

function snakeToCamelObjectKeys(obj) {
  return Object.keys(obj).reduce((output, key) => {
    let value = obj[key]
    
    const isObject = value.toString() === '[object Object]'
    if (isObject) {
      value = snakeToCamelObjectKeys(value)
    }
    
    const newKey = key.replace(/_(\w)/g, (match, $1) => $1.toUpperCase()) 
    output[newKey] = value
    
    return output
  }, {})
}