How does Mini Program dynamically modify the style of page tags

how does the address of the background image taken by the interface change the background image of the outermost page?

//wxss
page {
  background: url("http://music.163.com/api/img/blur/109951163240732641") no-repeat;
  background-position: 50%;
  background-size: auto 100%;
  height: 100%;
  overflow: hidden;
}
//js
wx.request({
  url: app.actionConf.songdetail+id,
  success: res => {
    console.log(res.data)
      //res.data.imageUrlurl?
      .....
  }
})
Mar.11,2021

Baidu has no results. It can only be solved by putting a view, on the outermost layer and the height is equal to 100vh.


I want to say there is another page, use image

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