<p dir="auto">a few days ago, the warmup code has been modified to generate the file of the ClassCollectionLoader. But now, the cache warmup command breaks because of duplicated class definitions</p>
<p dir="auto">This ticket is meant as a general place to leave ideas for future, possible JavaScript support in the Form component.</p>
<p dir="auto">JavaScript validation is already covered in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="4706883" data-permission-text="Title is private" data-url="https://github.com/symfony/symfony/issues/4383" data-hovercard-type="issue" data-hovercard-url="/symfony/symfony/issues/4383/hovercard" href="https://github.com/symfony/symfony/issues/4383">#4383</a>.</p>