object use own method in javascript

Question

can object define property to use own method?

litk this

obj = {
 prt:function(){console.log("HELLO")}
 prt0:obj.prt()
}

I want obj.prt0 -> "HELLO"

Answer 1

var obj = {
 prt:function(){
 console.log("HELLO")
 return "HELLO";
 },
 prt0: function(){
 this.prt()
 }
}
obj.prt0; //do nothing, it is only a method
obj.prt0(); //execute method, will print Hello

• HelloRacoon: i don't wanna use another methods. Isn't there any way to use only property? and why property cant approach own methods? even use this.method
• Jian Zhong: That depends on what you want to achieve. Because the prt is a function, and it can accept params, you need type () after the function name. If you only want a value, you can use a attribute, like var obj = { prt: 'HELLO'} the use obj.prt, BTW, call a function is simple and clear. why don't you want to use it, you

Answer 2

If you want obj.prt0 to have the value of "HELLO", then you're going about it the right way - use this to make it easier, and make sure you return from the function. Also you need to define prt0 after the object is created:

let obj = {
 prt: function() {
 console.log("HELLO");
 return "HELLO";
 }
};
obj.prt0 = obj.prt();
console.log(obj.prt0);

The above does call obj.prt to create the value. If you want prt0 to be a reference to prt - so if you call prt0 it calls prt, you can just do this:

let obj = {
 prt: function() {
 console.log("HELLO");
 return "HELLO";
 }
};
obj.prt0 = obj.prt;
console.log(obj.prt0());

The above will also call console.log("HELLO") twice.