W3C验证器在app-root处的index.html中返回一个错误。

Question

我试图验证我的html页面，但当我检索到以下错误。

Error: Element app-root not allowed as child of element body in this context. 
(Suppressing further errors from this subtree.)

From line 4347, column 7; to line 4347, column 16

r">↩      <app-root>

Content model for element div:
Flow content.
Neither tag is omissible.

这是我的index.html的html。

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>Example</title>
    <base href="/" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <link rel="icon" type="image/x-icon" href="favicon.ico" />
  </head>
  <body>
      <app-root></app-root>
  </body>
</html>

如果可能的话，我如何才能绕过测试？