Vue前端判断数据对象是否为空的实例

<?xml version="1.0" encoding="utf-8"?>
<configuration> 
<system.webServer>
 <rewrite>
  <rules>
  <rule name="Handle History Mode and custom 404/500" stopProcessing="true">
   <match url="(.*)" />
   <conditions logicalGrouping="MatchAll">
      <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
      <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
   </conditions>
   <action type="Rewrite" url="/index.html" />
  </rule>
  </rules>
 </rewrite>
 </system.webServer>
</configuration>

<img :src="image" alt="" srcset="">  跟路径 / 和../
data () {
 return {
 image: '../static/logo.png'
 }
}

<?xml version="1.0" encoding="utf-8"?>
<configuration> 
<system.webServer>
 <rewrite>
  <rules>
  <rule name="Handle History Mode and custom 404/500" stopProcessing="true">
   <match url="(.*)" />
   <conditions logicalGrouping="MatchAll">
      <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
      <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
   </conditions>
   <action type="Rewrite" url="/app/index.html" />
  </rule>
  </rules>
 </rewrite>
 </system.webServer>
</configuration>

build: {
 // Paths
 assetsRoot: path.resolve(__dirname, '../dist'),
 assetsSubDirectory: 'static',
 assetsPublicPath: '/app/',
}

var base = process.env.NODE_ENV === 'development' ? '/' : '/app/'

export default new Router({
 mode: 'history',
 base: base,
 routes: []
})

<img :src="image" alt="" srcset=""> ../
data () {
 return {
 image: '../static/logo.png'
 }
}

<img :src="image" alt="" srcset=""> ../
data () {
 return {
 image: '../static/logo.png'
 }
}