I'm dealing with the following Object structure:
{
a: "123"
b: "$a"
}
In this setup, b should always be equal to the value of a.
Any suggestions on how I can achieve this using JavaScript?
I'm dealing with the following Object structure:
{
a: "123"
b: "$a"
}
In this setup, b should always be equal to the value of a.
Any suggestions on how I can achieve this using JavaScript?
If you want to access the property b using a special method, you can utilize a getter within an object.
var obj = {
a: "123",
get b() {
return this.a;
}
};
console.log(obj.b);Another option is to explore an ES6 feature called Proxy.
The
Proxyobject allows for custom handling of fundamental operations (e.g., property lookup, assignment, function invocation, etc).
In this case, you can grab the prop, check if it contains a $, and return the value associated with that property.
var obj = { a: "123", b: "$a" },
p = new Proxy(obj, {
get: function(target, prop) {
return target[prop][0] === '$' ? target[target[prop].slice(1)] : target[prop];
}
});
console.log(p.b);To create a genuine JavaScript object, you can achieve this by using a getter and setter with the help of Object.defineProperty().
You have the option to establish a "class"
var person = new function()
{
this.name = "John",
this.age = 30
}
console.log(person.name)
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