How to use it?Any example?I try it, but faild.

I've made a JSFiddle: https://jsfiddle.net/87t53pwd/18/.

A small explanation: In the keep-alive block we have 3 usages of the same component with each a different state. We only want to keep the state cached of the first 2, and not the last.

The current version of keep-alive doesn't allow for this (because it only uses the name of the component, not the key). Now, it also looks at the key (so if either the name or the key matches something in the includes array, it caches it).

You can replace the newly built version of Vue by the old one and see the difference (it works vs it doesn't)

Thank you for your answer.
But I install vue via git://github.com/vuejs/vue.git#dev, but it seems not to work .

Yes, because this pull request has not been merged yet. If you try dev on my fork it should work

I have urgent need for this function in my project. When will it be merged? Or I can use RobbinBaauw:dev branch?
Thank you .

I can't merge it, the vue authors need to do that. You can use that branch if you want, you'll see here when / if it will be merged

OK. Thank you so much.

I try to install git://github.com/RobbinBaauw/vue.git#dev, but it seems not work with vue-router

Can you make a fiddle? In the project I use it for it works, also with vue-router.

Also, how did you use it? You should build vue manually as well as its dist files are not yet updated.

Sorry, it is my mistake.It works now.Thank you .