Element: [Bug Report] menu组件加入router属性后控制台报错

[SnailSword]

Element UI version

1.2.4

OS/Browsers version

win10 / chrome 56.0.2924.87

Vue version

2.1.8

Reproduction Link

http://jsfiddle.net/ncnzerg1/

Steps to reproduce

1. 打开官网提供的[menu组件示例(http://jsfiddle.net/api/post/library/pure/)
2. 在第四行加入 router="true" 或 router=true 或 router="false"属性，见重现链接

What is Expected?

控制台无报错

What is actually happening?

控制台报错

[Vue warn]: Invalid prop: type check failed for prop "router". Expected Boolean, got String. 
(found in <ElMenu>)

[animabear]

Write it like this:
:router="true"

[Leopoldthecoder]

参考楼上。