template: nuxt/koa In nuxt.config.js，router use 'hash',
env：dev env: prod is work fine.
1.Open home page; 2.Click 'About page' link to about page; 3.Refresh about page, it report:
vue.runtime.esm.js:475 Vue warn: Property or method "name" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option.
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