Is there a way to use variable keys in a JavaScript object literal?

Question

I have code like this.

var key = "anything";   
var object = {   
    key: "key attribute"  
};

I want to know if there is a way to replace that key with "anything".

like

var object = {  
    "anything": "key attribute"     
};

Answer 1

In ES6, use computed property names.

const key = "anything";   

const object = {   
    [key]: "key attribute"
//  ^^^^^  COMPUTED PROPERTY NAME
};

Note the square brackets around key. You can actually specify any expression in the square brackets, not just a variable.