Obsolete
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
The sort event was part of the table sorting algorithm in the table sorting model, a feature of the HTML 5 Working Draft added in December 2012 and removed in January 2016.
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https://developer.mozilla.org/en-US/docs/Web/Events/sort