first read clipboard and store the value in a variable then set that variable to local storage in javascript

You can use the JavaScript navigator.clipboard.readText() method to read the value from the clipboard and then store that value in a variable. After that, you can use the localStorage.setItem() method to set that variable value into the local storage.

Here is an example code for reading clipboard value and storing it in local storage:

index.tsx
// Read value from clipboard
navigator.clipboard.readText().then((clipboardData) => {
  // Store value in a variable
  let data = clipboardData;
  
  // Set variable value in local storage
  localStorage.setItem('clipboardData', data);
});
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In this code, navigator.clipboard.readText() reads clipboard data and returns a Promise that resolves with a string. The string value is stored in the clipboardData variable. Finally, the localStorage.setItem() method is used to set the clipboardData variable value into the local storage.