- Switched to plain JavaScript
- Tested the Unicode escape button functionality and it works as before
# Demo using JavaScript without jQuery

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Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
(cherry picked from commit c86d033a3ec0514efcd9524d03dce1b6551e487f)