Getting JavaScript object key list

Question

I have a JavaScript object like

var obj = {
   key1: \'value1\',
   key2: \'value2\',
   key3: \'value3\',
   key4: \'value4\'
}

How can I

Answer 1

       if(props.userType){
          var data = []
          Object.keys(props.userType).map(i=>{
                data.push(props.userType[i])
          })
          setService(data)
        }