[Bug Report] <el-form disabled="true"> doesn't block the clearable property in <el-input> #13187
Description
Element UI version
2.4.8
OS/Browsers version
OS X 10.13.6 / chrome 69
Vue version
2.5.17
Reproduction Link
https://jsfiddle.net/waltermitty/eywraw8t/436118/
Steps to reproduce
1.set disabled="true" in el-form
2.set clearable="true" in el-input
What is Expected?
the should not be clearable.
What is actually happening?
is still clearable.