Allow local mutation

[user72356]

Is there a rule that lets me mutate a local object? Something like:

function test()
{
    const myVar = { hello: "" };
    myVar.hello = "world";
}

I feel that maybe there should be an allowLocalMutation rule that allows the code above, for those who want to be less strict about total immutability and only want the input parameters to be immutable?

[RebeccaStevens]

What error are you currently getting? Is it for the "no-let" or "immutable-data" rule?

[user72356]

I get 'myVar' is never reassigned. Use 'const' instead.eslint[prefer-const] for the let myVar
(Actually for that one technically it's not coming from functional and I should have used a const anyway- Updated OP)

And a Modifying an existing object/array is not allowed.eslint[functional/immutable-data] under 2nd line.

[RebeccaStevens]

I'd recommended setting the option "ignoreAccessorPattern" for "immutable-data".
Then if you rename myVar to something like mutableMyVar then "immutable-data" will no longer report an issue.

If you aren't reassigning the variable then you should use const instead of let for the first line.