Input text field character counter in vanilla javascript

an input text field character counter is a useful feature often implemented in web applications to enhance user experience. it allows users to see the number of characters they have typed into a text input or textarea, providing real-time feedback on their input length. this is particularly important for fields with character limits, helping users avoid exceeding the allowed number of characters, which can lead to frustration or data submission errors.

in vanilla javascript, a character counter can be achieved by listening for input events on the text field. as the user types, the script captures the current length of the input and updates a display element to reflect this count. this functionality can be customized to include visual cues, such as changing colors when nearing the limit or displaying a warning message. overall, a character counter improves usability by ensuring users are aware of their input constraints and helps maintain data integrity.
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