I'm facing a perplexing compiler error while trying to define a function that requires an array as its sole argument.
Below is a concise scenario to reproduce the issue: http://www.example.com
import React from 'react'
type FooProps = {
onFoo: number[] => void,
onBar: Array<number> => void
}
function Foo(props: FooProps) {}
This results in errors such as "';' expected.ts(1005)".
When defining function types, it is important to include argument names within parentheses, even if they are irrelevant.
To demonstrate this, your example should be modified as follows:
type FooProps = {
onFoo: (arg: number[]) => void;
onBar: (arg: Array<number>) => void;
}
It is worth noting that while semicolons can follow function type definitions, they are not necessary.
Alternatively, you can define function types without using the arrow syntax:
type FooProps = {
onFoo(arg: number[]): void;
onBar(arg: Array<number>): void;
}
Here is an example of a type:
type CarProps = {
onCar: (y: string[]) => void;
onBike: (z: Array<string>) => void;
};
And here is an interface example:
interface CarProps {
onCar: (y: string[]) => void;
onBike: (z: Array<string>) => void;
}
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