错误：

在Vue内使用 iframe 标签 然后引入了外部链接 无法正常显示内容

Refused to frame 'http://xxxxxx/' 
because it violates the following Content Security 
Policy directive: "default-src 'self'". 
Note that 'frame-src' was not explicitly set, 
so 'default-src' is used as a fallback.

解决：

将html文件内 meta标头替换

<meta http-equiv="Content-Security-Policy"
    content="default-src * 'self' 'unsafe-inline' 
'unsafe-eval' data: gap: content: https://xxx.com;media-src * blob: 
'self' http://* 'unsafe-inline' 'unsafe-eval';style-src * 'self' 
'unsafe-inline';img-src * 'self' data: content:;connect-src * blob:;">