Strip Blank and Empty Lines from Your Text Remove blank lines and whitespace-only lines from text.

The Remove Empty Lines tool works under the hood by using the `split` method from JavaScript to divide the input text into individual lines at each newline character (`\n`). It then applies a filter function to exclude lines that do not meet the specified criteria, which is determined by whether the "Also remove whitespace-only lines" checkbox is checked. If this option is enabled, it uses the `trim` method from JavaScript to remove leading and trailing whitespace characters from each line before checking its length. The `filter` method then removes any lines where the trimmed string has a length of 0.

This logic is implemented using React's `useState` hook to store the state of the checkbox and the `useCallback` hook to memoize the filtering function, ensuring it only updates when necessary. When the input text changes or the checkbox is toggled, the tool re-runs this filtering process, splitting the text into lines, filtering out empty or whitespace-only lines as specified, and then joining the remaining lines back together with newline characters using the `join` method.

In terms of data structures, the tool uses arrays to store the individual lines of text after splitting. The time complexity of this algorithm is O(n), where n is the number of lines in the input text, because it makes a single pass through each line. This approach allows for efficient processing of large texts without significant performance degradation. By leveraging React's component lifecycle and JavaScript's built-in string manipulation methods, the tool achieves its functionality with a straightforward yet effective implementation.