Utilizing Typescript to troubleshoot linting issues

After running the TypeScript linter, I received the following error message: Do not use Function as a type. The Function type accepts any function-like value, providing no type safety when calling the function. This lack of specificity can lead to common bugs. Additionally, it allows for things like class declarations, which will cause errors at runtime if not called with new. If you require the function to accept specific arguments, it is recommended to explicitly define the function's shape. (eslint@typescript-eslint/ban-types)

I am utilizing the notify plugin from Quasar:

How can I go about resolving this error?

Here is the code snippet I am working with:

let hideNotification: Function
    function showNotification () {
      if (notification.value && notification.value.message !== '') {
        hideNotification = $q.notify({
          type: notification.value.type,
          message: notification.value.message,
          position: 'bottom-right',
          timeout: notification.value.timeout,
          actions: [{ icon: 'close', color: 'white' }]
        })
        void clearNotification()
      }
      if (notification.value.hide) {
        hideNotification()
      }
    }

Any help would be greatly appreciated!

Answer №1

Kindly utilize ()=>void in place of Function Type.

let hideNotification: () => void = () => {
  if (notification.value && notification.value.message !== '') {
    hideNotification = $q.notify({
      type: notification.value.type,
      message: notification.value.message,
      position: 'bottom-right',
      timeout: notification.value.timeout,
      actions: [{ icon: 'close', color: 'white' }],
    });
    void clearNotification();
  }
  if (notification.value.hide) {
    hideNotification();
  }
};

or

let hideNotification: () => void = () => {
  function showNotification(){
    if (notification.value && notification.value.message !== '') {
      hideNotification = $q.notify({
        type: notification.value.type,
        message: notification.value.message,
        position: 'bottom-right',
        timeout: notification.value.timeout,
        actions: [{ icon: 'close', color: 'white' }],
      });
      void clearNotification();
    }
    if (notification.value.hide) {
      hideNotification();
    }
  }
};

Answer №2

Following some investigation, I came across a scenario where a variety of classes were passed to the method isAllowed(Classes) and each item was checked with instance of Class.

I discovered that there is an alternative to Function called NewableFunction, which proved to be helpful in this situation.

While not a perfect solution, it did provide some assistance in handling the issue at hand.

For more information on callable and newable function types, you can refer to this documentation.

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