access object property from object method in javascript

I have something like

var foo = function(arg){
  var something = {
    myPropVal: "the code",
    myMethodProp: function(bla) {
      // do stuff with mypropval here
      alert(this) // => DOMWindow
    }
  }
}

is this possible? can i access the contents of myPropVal from within myMethodProp given the

sure you can

var foo = function(arg){
  var something = {
    myPropVal: "the code",
    myMethodProp: function(bla) {
      // do stuff with mypropval here
      alert(this) // => DOMWindow
      alert(this.myPropVal);
    }
  }

  alert(something.myMethodProp());
}
foo();

Yes, you can, below is an example.

obj = {
  offset: 0,
  IncreaseOffset: function (num) {
    this.offset += num
  },
  
  /* Do not use the arrow function. Not working!
  IncreaseOffset2: (num) => {
    this.offset += num
  } 
  */
}

obj.IncreaseOffset(3)
console.log(obj.offset) // 3

In the context of an anonymous function used as property in an object, this refers to the object and can be used to access other properties.

const robin = {
  firstName: 'Robin',
  lastName: 'Wieruch',
  getFullName: function () {
    return this.firstName + ' ' + this.lastName;
  },
};

console.log(robin.getFullName());
// "Robin Wieruch"

You might have to reference it as something.myPropVal.