2b991b32eb
Backport #28441 by wxiaoguang
Fix #28319
It only polyfills if there is no "SubmitEvent" class, so it has no side
effect for most users.
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
(cherry picked from commit
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| features | ||
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| test | ||
| utils | ||
| vendor | ||
| webcomponents | ||
| bootstrap.js | ||
| index.js | ||
| jquery.js | ||
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| svg.test.js | ||
| utils.js | ||
| utils.test.js | ||