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Alish Giri
Alish Giri

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Declaration using const vs freeze in Javascript

#javascript

Javascript const

Using const we can still modify the contents of a Javascript objects but the reference to this object will be immutable.

const product = {name: "Sugar", weight: "1 kg"}; product.name = "Some New Name"; console.log(product);
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{ name: "Some New Name", weight: "1 kg" }
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Javascript freeze

Using freeze is preferred in cases where we do not want to modify the contents of an object.

const product = {name: "Sugar", weight: "1 kg"}; Object.freeze(product); product.name = "Some New Name"; console.log(product);
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{ name: "Sugar", weight: "1 kg" }
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