3

We have created a JSON constant we are sharing with various LWC. While we can define the JSON reference as const, the properties on the object can be changed by calling code.

For example:

const constants = {
    label: '30 years',
    value: 30
};

While we cannot do this:

constants = 'ABC';

We can do this:

constants.label = '20 years';

Is there a way to lock down the properties of the JSON so that they cannot be changed?

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1 Answer 1

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3

At a basic level, you can just freeze the object:

const constants = { label: '30 years', value: 30 }
Object.freeze(constants);

You can also use an immutable membrane, which you can start by using salesforce's ObservableMembrane implementation. Unlike Object.freeze, this protects an object's properties recursively, making the entire object graph immutable.

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