Within this function, the first argument must be a function while the remaining arguments could be of any type and their length is unknown. How should I define the array type to have a known first element but unknown length and types for the rest?
// I attempted using ...args: [Function, any], however, eslint does not approve of the generic 'Function' type and throws an error
function test(...args: Array<????>) {
const [callbackFn, ...restOfArgs] = args;
// perform necessary actions
}
To separate the initial argument and capture the remaining arguments, utilize the "..." syntax. Substitute the () => void with your specific callback function type.
function test(callbackFunction: () => void, ...args: unknown[]): void {
callbackFunction()
// Retrieve the leftover arguments as if accessing an array
}
UPDATE: Upon further reflection, I realize that my initial response was incomplete. To consolidate all arguments under a single variable, implement the following approach:
function test(...args: [() => void, ...unknown[]]): void {
args[0]()
}
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