Cause: The browser does not support Extended operator es6
in conclusion:
1. do not ...
2. babel-polyfill ... engage the extended operator is not very good, to install a separate
plugin-proposal-object-rest- spread
Scene: 11.2 wkwebview end embedded applications ios
pc-chrome no problem, no problem ios high version, testers have a black and white ios11.2 error, the error message is opened Unexpected token '...'. Expected a property name.
Reproduced in: https: //www.cnblogs.com/thinkingthigh/p/11057079.html