[jira] [Comment Edited] (WEEX-327) 在ios的safari上bfcache失效（MessageChannel引起

["Danz He (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/WEEX-327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16465751#comment-16465751 ] 

Danz He edited comment on WEEX-327 at 5/7/18 10:33 AM:
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I've tried to remove this line of code, it still happened. The 'MessageChannnel' implementation is causing this trouble indeed, but it may have our scrollable components (list, scroller, etc) involved in somehow, according to my preliminary investigating.

I'll look into this. You can follow my further progress in this issue: [https://github.com/weexteam/weex-vue-render/issues/17] , and of course also in this Jira issue.


was (Author: danzh):
I've tried to remove this line of code, it still happened. The 'MessageChannnel' implementation is causing this trouble indeed, but it may have our scrollable components (list, scroller, etc) involved in somehow, according to my preliminary investigating.

I'll look into this. You can follow my further progress in this issue: [https://github.com/weexteam/weex-vue-render/issues/17] , and of cause also in this Jira issue.

> 在ios的safari上bfcache失效（MessageChannel引起
> --------------------------------------
>
>                 Key: WEEX-327
>                 URL: https://issues.apache.org/jira/browse/WEEX-327
>             Project: Weex
>          Issue Type: Bug
>          Components: Web Renderer
>    Affects Versions: 0.18
>         Environment: ios 11.3
> 浏览器：ios上所有浏览器
>            Reporter: wj
>            Assignee: Danz He
>            Priority: Major
>              Labels: weex, weex-vue-render
>   Original Estimate: 12h
>  Remaining Estimate: 12h
>
> 问题复现：
> 1.打开下面dotWe链接：
> [http://dotwe.org/vue/b9a2bf2c5b5d39d61026f09b28905239]
> 2.点击手机模型下方的“Open it in a new page”得到独立页面的地址
> 3.用ios的safari的打开得到的地址
> 4.在列表页滚动一段距离，然后点击随便一个item跳转到下一页。
> 5.在下一页返回
> 期望表现：
> 应该从bfcache中恢复页面，返回后列表停在原来位置。
> 实际表现：
> 列表回到了顶部，页面js重新执行了。如果监听页面的pageshow事件，会发现event.persisted始终是false。
> 这个bug最早是在vue2.5.16上发现的[点这里|https://github.com/vuejs/vue/issues/8109]
> 因为vue2.4.4以后用到了MessageChannel导致了这个bug，所以在一个标准的vue工程里把vue版本降回2.4.3就没有问题了。
> 但是！在weex的工程里，就算我把vue版本降回2.4.3，还是不行，最终发现是下面这一行的问题
> [weex-vue-render/src/weex/index.js|https://github.com/weexteam/weex-vue-render/blob/5a8218089deebed99b6e1808e5a7a058a18b2373/src/weex/index.js#L28]
> Line 28 in [5a82180|https://github.com/weexteam/weex-vue-render/commit/5a8218089deebed99b6e1808e5a7a058a18b2373]
> | |import 'core-js/modules/es6.promise'|
> core-js这个库也用到了MessageChannel
> （飞猪的线上产品也是有这个问题的：[https://m.fliggy.com/?_projVer=0.1.128）|https://m.fliggy.com/?_projVer=0.1.128%EF%BC%89]



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