this in object method functions

//three ways of writing a method function for an object
const temp = {
    name:"dallas",
    method1:function(){
        console.log(this.name); //dallas
    },
    method2() {
        console.log(this.name); //dallas
    },
    method3:()=>{
        console.log(this.name); //undefined
    }
   
}
temp.method3();