Javascript equivalent of Typescript const assertion

Question

What is the javascript equivalent for typescript's const assertion?

const arr = [1,2,3,4] as const

I want to achieve this array in javascript to avoid further mutation.

As mentioned here, at runtime, there is no difference with using as const. So, what is the expected behavior in javascript and why do you need this? Do you want avoid mutations on arr? — adiga
– adiga, Commented Dec 9, 2022 at 7:02

adiga · Accepted Answer · 2022-12-09 07:15:12Z

5

const arr = [1, 2, 3, 4, 5];
Object.freeze(arr);

arr.push(8); // Uncaught TypeError: Cannot add property 5, object is not extensible

adiga

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answered Dec 9, 2022 at 6:57

Anil kumar

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