contenteditable="plaintext-only" always rendered into contenteditable="true"

[css-master]

Version

2.5.21

Reproduction link

https://jsfiddle.net/pupilGradeSix/busmq2zp/2/

Steps to reproduce

open the link

What is expected?

contenteditable="plaintext-only" 能正常渲染成 plaintext-only 而不会变成 true

What is actually happening?

contenteditable="plaintext-only" 总是会被渲染成 contenteditable="true" 。最终我只能通过给 contenteditable 动态添加属性 plaintext-only 才能成功。试了几个 vue 的版本发现都存在这个问题。

[posva]

plaintext-only is still at draft status. We need to wait until it becomes a standard and/or is implemented by browsers

[yyx990803]

Added support in e632e9a

In 3.0 we are likely going to stop force casting enumerated attributes anyway.