如何修复@typescript-eslint/no-misused-promises 错误

Question

I have a onClick() method for a PrimaryButton class. I got @typescript-eslint/no-misused-promises error from eslint check. Code as below:

onClick = { () =>
    Utils.getName(a, b).then(
        (name) => {
            Utils.deleteThing(name, x, y);
        })
    }

How should I fix my code to avoid this error? Would appreciate your help. Thanks!

Update: eslint config as follows

Error message is on the line of onClick():

Answer 1

The error states that a void return was expected. But instead, you are returning a promise.

onClick = { () =>
    Utils.getName(a, b).then(
        (name) => {
            Utils.deleteThing(name, x, y);
        })
    }

The way you write your arrow function, you are returning the below code (a promise) rather than running it and just returning nothing:

Utils.getName(a, b).then(
            (name) => {
                Utils.deleteThing(name, x, y);
            })

However, if you write your code like this, void is returned and the code is actually ran:

onClick = { () => {
    Utils.getName(a, b).then(
        (name) => {
            Utils.deleteThing(name, x, y);
        })
    }
}

The key is how an arrow function works. If you leave out the { } after the => , the return is implied to be the single statement after the => which is not what you wanted. You didn't want to return the Utils.getName function, you just wanted it to run. See here for more info.