Laravel 5.4 Vue could not working - development

Laravel 5.4 Vue could not working

I use <example></example> In my blade file, and only modify Example.vue

I'm an example component!

To

I'm an example component!!!

Then I run npm run dev, It said mix success.
But In browser,I Could not see the change.
I tried disable cache and clear laravel cache,but it could not working!

Could anybody Help? Thanks a lot.

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