* [jsfm] fix bug: event will not be registered to document if the "ap…

[alext1981]

reproduce： weex/examples/component/scroller-demo.js

reproduce method： pull up the list at the end，the loading component will not be hidden, because the loading event does not be invoked

root cause: when creating the virtual DOM tree, if the root container's "append" attribute is "tree", the whole page will be create first and then be added to the document, which means that the docId will be assigned to the root container at last, while all of its children nodes can not get the docId when they are being created. A node couldn't be added to the "nodemap" of document if it do not have the docId. If an event is passed from native, the current document cannot find the proper component to handle it, because its "nodemap" is empty.

function compileNativeComponent(vm, template, dest, type) {
.......
const treeMode = template.append === 'tree'
  const app = vm._app || {}
  if (app.lastSignal !== -1 && !treeMode) {
    console.debug('[JS Framework] compile to append single node for', element)
    app.lastSignal = attachTarget(vm, element, dest)
  }
  if (app.lastSignal !== -1) {
    compileChildren(vm, template, element)
  }
  if (app.lastSignal !== -1 && treeMode) {
    console.debug('[JS Framework] compile to append whole tree for', element)
    app.lastSignal = attachTarget(vm, element, dest)
  }
}

[CLAassistant]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

---

aoxiao.tjb seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.

[Hanks10100]

@alext1981 Thanks for solving this problem. We also found this bug in #1148 , and fixed it in #1173 .

More tips for contribute weex:

• You should sign our Contributor License Agreement first.
• This bug is in js framework, merge your code to jsfm-feature-{version} is more appropriate.

Welcome to send PRs or open issues. Wish you could pay attention on weex continuously.

[Hanks10100]

We ignored to remove the node from nodeMap, you can send PR to solve this.