taro跨端小程序环境下canUseDom判断依据不足，addEventListener undef

[LesterWeng]

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[LesterWeng]

taro3.2.15版本 不存在window.addEventListener

[liuyib]

window.addEventListener IE9 都支持的东西，taro 3.2.15 不支持，没办法，为特定工具做 polyfill 代价太大。

另外，要支持的话，也不能只是加个检测判空那么简单，还得让功能可用起来，比较麻烦，需要给缺少的 api 都加上可用的 polyfill，所以只能靠工具自己支持了~

目前来看，最新的 taro 已经处理了，PR 关了~