CODEWITHSUNDEEP
javascriptecmascript-6
Simply Innovative
Simply Innovative

Reputation: 568

How to use const keyword (ecma 6) with function static variable in javascript

I have a JavaScript function which has a static variable:

function Constants() {

}

Constants.i = '1';

Now according to ECMA 6 we have const keyword. Using this we can make a variable as immutable.

I am not able to find how to use const keyword with function static variable, if I use like below it is not loading the function:

const Constant.i = '1';

It will be very helpful if anyone can suggest the proper way of doing the same.

Upvotes: 0

Views: 123

Answers (1)

nils
nils

Reputation: 27174

const only works for variables, not for object (or function) properties.

As mentioned above, you can use Object.defineProperty to define an object property that cannot be changed:

function Constants() {

}

Object.defineProperty(Constants, 'i', {
    value: '1',
    writable: false, // this prevents the property from being changed
    enumerable: true, // this way, it shows up if you loop through the properties of Constants
    configurable: false // this prevents the property from being deleted
});

Upvotes: 1

Related Questions