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javascriptjqueryobjectproperties

Setting property value from other property value inside object

Is there a way to set the value of a property within an object relative to another property within the same object?

For example:

var myObj = {
    prop1 = 10,
    prop2 = prop1 + 5
};

alert(myObj.prop2); //Alerts 15

Another example would be for when I create objects within an object aswell

var mainObj = {
    obj1: {x: 100, y:100},
    obj2: {x: obj1+10, y: obj1+10}
};

alert(mainObj.obj2.x); //Alerts 110

I want certain properties to stay relative to other properties in the same object, so that when I change one property, it will affect the other property.

Solution

  • You can declare your properties as functions

    var obj = {
  prop1:1,
  prop2:function(){
    return this.prop1 + 1;
  }
}