Object Destucturing

Javascript Object Destucturing:

    <script>
    const setting = {
        notification :{
            name:true,
            age:15,
            gender:"male",
            school:{
                meddle:"daegu",
                high:"seoul"
            }
        },
        color:{
            theme:"dark",
            OS:"IOS"
        }
    }

    const {notification:{school:{meddle}}} = setting;

    console.log(meddle)
    // output "daegu"
    
    
    ////////////////////////////////////////////
    
    const settings = {
      color : {
      	mon:"red",
          web:"black"
        }
      }
      
    let dayColor = "blue"
    console.log(dayColor)  // output: "blue"
    
    ({color:{mon: dayColor = "light"}} = settings);
    console.log(dayColor) // output : "red"
    
    </script>