How can I insert properties and functions inside a ref? Like this example: Then I want to use the propertie loading and the function onTest that way: How can I do that? Answer You cannot set ref on functional components because they don’t have an instance. You may not use the ref attribute on function components because they donâ€™t have instances. (source: https://reactjs.org/docs/refs-and-the-dom.html#accessing-refs) To make your example working you need to convert <MyComponent /> to class component.
I have a firebase storage path that looks like this. firebase.storage().ref(‘temp/test’) the “test” folder has about 25-50 files. I know there is not a way to delete the whole directory in firebase but Is there a way to iterate through all the files in a directory and deleting them one by one? Answer Is there a way to iterate through all the files in a directory and deleting them one by one? Yes, you can use the listAll() method, as follows: Note that: This method is only available for Firebase Rules Version 2 (add rules_version = ‘2’; at the top
I am getting this error – Can’t perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in a useEffect cleanup function. Here’s my useEffect hook, I used a ref called mounted to check if the component has unmounted or not but I am still getting the error when the component unmounts. (It takes about a minute for the error to show up). TIA Answer I usually store all my subscriptions on my component state and then call them when
I am trying to get a cookie specifically from a domain using this code: The problem is that the alert always says undefined. However, if I change to it works properly. How do I save the value to use later? Update: It appears that if I call alert(ID) from the chrome console after the script runs, it works. How can I set my code to wait until chrome.cookies.get finishes running? Answer Almost all Chrome API calls are asynchronous, so you need to use callbacks to run code in order:
When one is typing slowly “a” & “b” the above code will result in “a”, “b” in the console log. But the problem is when somebody does it quickly. The result then is “ab”, “ab”. It’s easier to repeat this situation with letters which are near on a keyboard e.g. “e” & “r”. How to avoid it? Events keydown and keypress does not suffer from this problem of quick-typist, but they are also fire to early. Result: returned value of an input does not contain the last typed letter when they occur. Or maybe there is a way to get