[Bug Report] Drawer, a new component, has a small problem: the default value of the appendToBody attribute in the document is false, but the default value in the code is true, the modal-append-to-body attribute in the document is not working well, it seems that the props in the code is not received.

[Minions51390]

Element UI version

2.11.1

OS/Browsers version

Chrome 69.0.3497.92

Vue version

2.6.10

Reproduction Link

https://codepen.io/minions51390/pen/aepEpj

Steps to reproduce

点击按钮，设置modal-append-to-body属性为false后发现dom依然被append到了body里面，
这个链接里面我没有设置append-to-body属性，按照文档上说明append-to-body默认值为false，那么drawer的dom应该被append到class名为drawer-wrapper的div下面但是依旧被append到body下面。

What is Expected?

设置modal-append-to-body属性为false后，dom会被添加到Drawer 的父元素上。
不设置append-to-body属性，dom会被添加到Drawer 的父元素上。

What is actually happening?

modal-append-to-body属性好像没有生效。
不设置append-to-body属性，dom会被添加body上面。

[element-bot]

Translation of this issue:

Element UI version

2.11.1

OS/Browsers version

Chrome 69.0.3497.92

Vue version

2.6.10

Reproduction Link

Https://codepen.io/minions 51390/pen/aepEpj

Steps to reproduce

Click on the button and set the modal-append-to-body attribute to false. It is found that the DOM is still append to the body.

In this link, I did not set the append-to-body attribute. According to the document, the default value of append-to-body is false. Then the drawer's DOM should be append to the div named drawer-wrapper, but still append to the body.

What is Expected?

When the modal-append-to-body attribute is set to false, DOM is added to the parent element of Drawer.
Without setting the append-to-body attribute, DOM is added to the parent element of Drawer.

What is actually happening?

The modal-append-to-body attribute does not seem to be in effect.

Without setting the append-to-body attribute, DOM will be added to the body.

[cuevven]

The modal and modal-append-to-body attributes don't work.

[ziyoung]

@JeremyWuuuuu 看一下。

[jw-foss]

@ziyoung Got it.

[jw-foss]

@Minions51390 @cuevven It's a bug, which will be fixed @ next release. I am so sorry for the bug.

[Minions51390]

@JeremyWuuuuu 辛苦修复，超喜欢elementUI，很棒很棒的组件库~

[jw-foss]

@Minions51390 感谢!

[jw-foss]

#16953
You can watch this PR to track the process.
PR 已提