create a synchronous function that first copies the clipboard then sets that value to local storage in javascript

index.tsx
function copyToLocalStorage() {
  let clipboardData;
  let storageKey = 'clipboardData';
  
  // Copy clipboard data
  navigator.clipboard.readText().then(data => {
    clipboardData = data;
    
    // Set clipboard data to local storage
    localStorage.setItem(storageKey, clipboardData);
  });
}
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This function first reads the clipboard data synchronously and then sets the value to a local storage key. Once the clipboard data has been read, it sets the value to local storage by calling the setItem() function on the localStorage object, using the storageKey as the key and the clipboardData as the value.

Note that the navigator.clipboard.readText() function returns a promise, so we need to use the then() method to wait for the promise to resolve before setting the local storage value.